Practice Test

Q1) Lime water reacts with chlorine to form Show Answer

Q2) NaOH is obtained by electrolysis of Show Answer

Q3) Assertion :
Carbonic acid is weak acid.
Reason :
It ionised completely in aqueous solution. Show Answer

Q4) Assertion :
Universal indicator gives green colour with distilled water.
Reason :
pH of distilled water is 7 and it is neutral and universal indicator gives green colour with neutral solution. Show Answer

Q5) An aqueous solution 'A' turns phenolphthalein solution pink. On addition of an aqueous solution 'B' to 'A', the pink colour disappears. The following statement is true for solution 'A' and 'B'. Show Answer

Q6) Which one of the following can be used as an acid-base indicator by a visually impaired student? Show Answer

Q7) Which of the following is acidic in nature? Show Answer

Q8) During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to Show Answer

Q9) Which of the following are present in a dilute aqueous solution of hydrochloric acid? Show Answer

Q10) What happens when a solution of an acid is mixed with a solution of a base in a test tube?
i) The temperature of the solution increases
ii) The temperature of the solution decreases
iii) The temperature of the solution remains the same
iv) Salt formation takes place Show Answer

Q11) Which of the following is used for dissolution of gold? Show Answer

Q12) Which of the following salts does not contain water of crystallisation? Show Answer

Q13) Sodium carbonate is a basic salt because it is a salt of Show Answer

Q14) Common salt besides being used in kitchen can also be used as the raw material for making
(i) washing soda.
(ii) bleaching powder.
(iii) baking soda.
(iv) slaked lime. Show Answer

Q15) One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is Show Answer

Q16) Which of the following is not a salt? Show Answer

Q17) A compound is prepared from gypsum upon heating to a temperature of 373 K and it changes back to gypsum on adding water. Which is the incorrect statement about the compound? Show Answer

Q18) A milk man adds a very small amount of baking soda to fresh milk. Why? Show Answer

Q19) Which of the given substances is used in the following applications?
I. It is used as a fire proofing material.
II. It is used for sealing gaps in laboratory apparatus.
III. It is used in making toys. Show Answer

Q20) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): After white washing the walls, a shiny white finish on walls is obtained after two to three days.
Reason (R): Calcium Oxide reacts with Carbon dioxide to form Calcium Hydrogen Carbonate which gives shiny white finish. Show Answer

Q21) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): When zinc is added to dilute hydrochloric acid, hydrogen is given off.
Reason (R): Hydrogen chloride molecules contain hydrochloric acid and hydrogen atoms. Show Answer

Q22) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A):Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid.
Reason (R): Carbon dioxide is given off in the reaction. Show Answer

Q23) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): Ammonia solution is an alkali.
Reason (R): Ammonia solution turns blue litmus paper red. Show Answer

Q24) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): When common salt is kept open, it absorbs moisture from the air.
Reason (R): Common salt contains magnesium chloride. Show Answer

Q25) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): Baking soda creates acidity in the stomach.
Reason (R): Baking soda is alkaline. Show Answer

Q26) Directions: In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): Plaster of Paris is used by doctors for setting fractured bones.
Reason (R): When Plaster of Paris is mixed with water and applied around the fractured limbs, it sets into a hard mass. Show Answer

Q27) Chlorine gas reacts with ________ to form bleaching powder. Show Answer

Q28) Identify the correct statement from the following: Show Answer

Q29) What will happen if we take dry HCl gas instead of aqueous solution of HCl? Show Answer

Q30) Predict the pH value of the water of river Yamuna if the reason for froth is high content of detergents dissolved in it. Show Answer

Q31) Which of the following statements is correct for the water with detergents dissolved in it? Show Answer

Q32) High content of phosphate ion in river Yamuna may lead to: Show Answer

Q33) If a sample of water containing detergents is provided to you, which of the following methods will you adopt to neutralize it? Show Answer

Q34) The three constituents pf plaque are Show Answer

Q35) The pH which leads to tooth decay ? Show Answer

Q36) State the time during the day when condition is most favorable for process of tooth decay. Show Answer

Q37) The nature of toothpaste commonly used to protect tooth decay is: Show Answer

Q38) Which of the following statement is correct in terms of glowing of bulb when the switch is ON ? Show Answer

Q39) The bulb glows in a solution depending on whether the solution is: Show Answer

Q40) Which of the following are present in a dilute aqueous solution of hydrochloric acid? Show Answer

Q41) Which of the following statement is true if alcohol is replaced with NaOH solution: Show Answer

Q42) The above experimental set up shows reaction between metal and Show Answer

Q43) Which gas is liberated during the process? Show Answer

Q44) Write the products formed in the above process: Show Answer

Q45) A new product sodium zincate is formed if sulphuric acid is replaced with: Show Answer

Q46) The chemicals are: Show Answer

Q47) Which of the following reaction is incorrect ? Show Answer

Q48) The chemicals that can be used as an acid-base indicator by a visually impaired student is _______. Show Answer

Q49) If acetic acid and hydrochloric acid of same concentration are taken, HCl is a stronger acid because it contains: Show Answer

Q50) Name the gas evolved: Show Answer

Q51) The gas evolved is: Show Answer

Q52) If the metal used above is zinc, choose the correct balanced chemical equation for the evolution of gas? Show Answer

Q53) What nature of hydrogen is used as a fuel in rocket? Show Answer

Q54) Name the product when water is added to quicklime. Show Answer

Q55) The common name for quick lime is: Show Answer

Q56) The correct formula for calcium hydroxide is: Show Answer

Q57) Which of the following statements is correct about the above reaction based on your observation?
(i) It is an endothermic reaction.
(ii) It is an exothermic reaction.
(iii) The pH of the resulting solution will be more than seven.
(iv) The pH of the resulting solution will be less than seven. Show Answer

Q58) Name the gas produced by the reaction of baking soda and acid which helps as fire extinguisher: Show Answer

Q59) Name the products formed when baking soda is heated: Show Answer

Q60) The pH of baking soda solution is: Show Answer

Q61) What is the chemical name for baking soda? Show Answer

Q62) Identify B: Show Answer

Q63) What type of reaction occurs when B is treated with an acidic oxide? Show Answer

Q64) What is the raw material used in chloro-alkali? Show Answer

Q65) Identify the basic salt from the following salts : Show Answer

Q66) What is the nature of the new product which is formed by the action of water on quick lime ? Show Answer

Q67) The pH range most conducive for life of fresh water plants and animals is : Show Answer

Q68) Phenolphthalein turns acids to ..... solution. Show Answer

Q69) Which of the following salts do not contain water of crystallisation ? Show Answer

Q70) Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg) ? Show Answer

Q71) Which one of the following is acidic in nature ? Show Answer

Q72) The chemical formula for plaster of Paris is : Show Answer

Q73) An aqueous solution 'A' turns phenolphthalein solution pink. On addition of an aqueous solution 'B' to 'A' and 'B'. Show Answer

Q74) To protect tooth decay we are advised to brush out teeth regularly. The nature of the tooth paste commonly used is : Show Answer

Q75) Which one of these acid-base indicators is used by a visually impaired student ? Show Answer

Q76) When you add a few drops of acetic acid to a test-tube containing sodium bicarbonate powder, which one of the following is your observation ? Show Answer

Q77) A student puts a drop of reaction mixture of a saponification reaction first on a blue litmus paper and then on a red litmus paper. He may observe that : Show Answer

Q78) The pH value of a sample of hydrochloric acid is 2. pH value of this sample when diluted by adding water will be : Show Answer

Q79) While preparing soap a small quantity of common salt is generally added to the reaction mixture of vegetable oil and sodium hydroxide. Which one of the following may be the purpose of adding common salt ? Show Answer

Q80) Baking soda is a mixture of : Show Answer

Q81) Sodium hydrogencarbonate when added to acetic acid evolves a gas. Which of the following statements are true about the gas evolved ?
(I) It turns lime water milky.
(II) It extinguishes a burning splinter.
(III) It dissolves in a solution of sodium hydroxide.
(IV) It has a pungent odour. Show Answer

Q82) If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done ? Show Answer

Q83) Which one of the following types of medicines is used for treating indigestion ? Show Answer

Q84) Which of the following is used for dissolsution of gold ? Show Answer

Q85) During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to : Show Answer

Q86) 10 ml of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralise it will be : Show Answer

Q87) Assertion :
Solutions of compounds like alcohol and glucose do not show acidic character.
Reason :
They do not show acidic character because they do not dissociate into ions. Show Answer

Q88) Assertion :
Curd and sour substances should not be stored in copper vessels.
Reason :
Curd and other sour substances should not be kept in brass and copper vessels as they contain acids. Show Answer

Q89) Assertion :
Calcium starts floating when added in water.
Reason :
Calcium starts floating because the bubbles of oxygen gas which are formed during the reaction stick to the surface of the metal. Show Answer

Q90) Assertion :
Tap water conducts electricity but distill water does not conducts electricity.
Reason :
Tap water conducts electricity as it contains ions whereas distilled water does not contain ions. Show Answer

Q91) Assertion :
Most of the metals do not give hydrogen while reacting with nitric acid.
Reason :
Nitric acid is a weak oxidising agent. Show Answer

Q92) Assertion :
Plaster of Paris should be stored in dry place.
Reason :
To prevent its reaction with moisture. Show Answer

Q93) Assertion :
An aqueous solution of acid conducts electricity.
Reason :
It is because in the solution it dissociates into ions. Show Answer

Q94) Which of the following is compound C ? Show Answer

Q95) Which of the following is compound D ? Show Answer

Q96) What is the nature of the solution formed by dissolving D in water ? Show Answer

Q97) Which among the following is compound F. Show Answer

Q98) Sodium carbonate is a basic compound because it is a salt of a Show Answer

Q99) The correct order of acidic strength is : Show Answer

Q100) The pH value of four solutions are
A = 1
B = 9
C = 3
D = 13
Choose the correct statement : Show Answer

Q101) Choose the incorrect statement : Show Answer

Q102) Gas A, obtained above is a reactant for a very important biochemical process which occurs in the presence of sunlight. Identify the name of the process. Show Answer

Q103) Calcium oxide can be reduced to calcium, by heating with sodium metal. Which compound would act as an oxidizing agent in the above process ? Show Answer

Q104) Choose the correct statement :
Show Answer

Q105) Nature of the aqueous solution of common salt is : Show Answer

Q106) Which of the following compounds is alkaline in an aqueous medium ? Show Answer

Q107) Adding common salt to water will result in : Show Answer

Q108) Examine a few statements regarding NaCl.
(I) It is prepared by Chlor-alkali process
(II) It is a white crystalline substance
(III) It also exists in the form of rocks called rock salt
(IV) It is a neutral salt with a pH value = 7 Show Answer

Q109) After treatment, the doctor repacked the white powder back into moisture proof, airtight container. Why ? Show Answer

Q110) What is 'white, solid hard mass' called as ? Show Answer

Q111) The reaction involved in the formation of white mass is : Show Answer

Q112) The graph shows the porosity and expansion of plaster with respect to water content. At what temperature, the reaction would occur ? Show Answer

Q113) The difference of water molecules in gypsum and Plaster of Paris is : Show Answer

Q114) Plaster of Paris is known for its hardening. It is due to:
Show Answer

Q115) Choose the incorrect statement : Show Answer

Q116) Choose the incorrect statement related to gypsum : Show Answer

Q117) We can obtain Plaster of paris by : Show Answer

Q118) Which of the following is not a acidic salt? Show Answer

Q119) A solution of NaC1
(i) will turn red litmus blue
(ii) will turn pH paper green
(iii) will turn blue litmus red
(iv) will not affect litmus Show Answer

Q120) Many salts absorbs water from atmosphere. This property is called Show Answer

Q121) An aqueous solution with pH = 1 is Show Answer

Q122) Egg shell is made up of Show Answer

Q123) Curd cannot be stored in
(i) Brass vessel
(ii) Copper vessel
(iii) Steel
(iv) Bronze Show Answer

Q124) An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change? Show Answer

Q125) Calcium phosphate is present in tooth enamel. Its nature is Show Answer

Q126) A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue? Show Answer

Q127) Which of the following gives the correct increasing order of acidic strength ? Show Answer

Q128) Which of the following phenomena occur, when a small amount of acid is added to water ?
(i) Ionisation
(ii) Neutralisation
(iii) Dilution
(iv) Salt formation Show Answer

Q129) Which among the following is not a base? Show Answer

Q130) Which of the following statement is not correct? Show Answer

Q131) Which of the following is(are) true when HC1 (g) is passed through water?

(i) It does not ionise in the solution as it is a covalent compound.
(ii) It ionises in the solution.
(iii) It gives both hydrogen and hydroxyl ion in th solution.
(iv) It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule. Show Answer

Q132) Which of the following statements is true for acids? Show Answer

Q133) Methyl orange indicators gives red colour in acidic solution and yellow colour in basic solution. Show Answer

Q134) All the organic acids are strong acids. Show Answer

Q135) The dilution of a concentrated acid should always be done by adding concentrated acid to water gradually with stirring. Show Answer

Q136) Glucose solution conduct electricity. Show Answer

Q137) The strength of an acid or base is measured on a scale of numbers called pH paper. Show Answer

Q138) The more alkaline a solution,the more is the pH. Show Answer