Practice Test

Q1) The only metal that is liquid at room temperature is Show Answer

Q2) The reactivities of iron, magnesium , sodium and zinc towards water are in the following order Show Answer

Q3) Food cans are coated with tin and not with zinc because Show Answer

Q4) Silicon is used in Show Answer

Q5) Aluminium is used in thermite welding because Show Answer

Q6) Aluminium does not oxidise readily in air because Show Answer

Q7) The best mealleable metal is Show Answer

Q8) The process of heat the ore in the presence of excess supply of air below its meting point is called Show Answer

Q9) German silver is a mixture of Show Answer

Q10) The white phosphorus is stored Show Answer

Q11) The electrolytic reduction process is used for the extracting of Show Answer

Q12) Cinnabar is an ore of Show Answer

Q13) Among the following statements, the incorrect one is Show Answer

Q14) The slag obtained during the extraction of copper from copper pyrities is composed mainly of Show Answer

Q15) Of the following, which cannot be obtained by electrolysis of the aqueous solution of their salts?
Show Answer

Q16) The commonest disaccharides has the molecular formulas Show Answer

Q17) Fats and Oils are:
Show Answer

Q18) What is fat? Show Answer

Q19) Which of the following gives maximum energy in metabolic process? Show Answer

Q20) Alkaline hydrolysis of esters is known as Show Answer

Q21) Which among the following is the simplest sugar ?
Show Answer

Q22) Amino acids are the building blocks of Show Answer

Q23) Which carbohydrate is essential constituent of plant cell? Show Answer

Q24) The linkages present in proteins and peptides is Show Answer

Q25) The number of essential amino acids in man is Show Answer

Q26) Cellulose is a polymer of Show Answer

Q27) Enzymes are made up of Show Answer

Q28) Which of the following is not an amino acid? Show Answer

Q29) Peptides on hydrolysis give Show Answer

Q30) Insulin, a hormone, chemically is a Show Answer

Q31) The reason for double helical structure of DNA is operation of Show Answer

Q32) The nucleic acid base having two possible binding site is Show Answer

Q33) Important objective of biotechnology in agricultural selection is Show Answer

Q34) The new strain of bacteria produced by biotechnology in alcohol industry is Show Answer

Q35) The main technique involved in agricultural biotechnology in called Show Answer

Q36) The prerequisites for biotechnological production of antibiotics is Show Answer

Q37) Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by z ? Show Answer

Q38) Metals generally are
1) reducing agents
2) oxidising agent
3) electropositive in nature
4) electronegative in nature Show Answer

Q39) Which of the following statements are correct?
1) All minerals cannot be an ore
2) All ore cannot be a mineral
3) All minerals are ores
4) All ores are minerals Show Answer

Q40) Duralumin is a mixture of
1) copper
2) tin
3) aluminum
4) manganese
Show Answer

Q41) Which of the following alloy(s) contain tin?
1) Bronze
2) Gun metal
3) German silver
4) Type metal Show Answer

Q42) The incorrect statement(s) in respect of haemoglobin is that it
1) function as a catalyst for biological reaction.
2) maintains blood sugar level.
3) acts as an oxygen carrier in the blood.
4) forms antibodies and offers resistance to diseases. Show Answer

Q43) Which of the following statement(s) are true?
1) All amino acids, including glycine , are ampholyte.
2) An amino acid may be neutral, acidic or basic.
3) The basic functional group in amino acids is --COO---.
4) Amino acids exist in zwitter ionic from in aqueous solution .
Show Answer

Q44) Hydrogenation of oils involves
1) saturation of unsaturated fatty acids
2) reaction with hydrogen in presence of nickel
3) conversion into saturated fatty acids
4) driving off the impurities in oil by hydrogen gashh Show Answer

Q45) The prerequisites for biotechnological production of antibiotics is
1) to search an antibiotic producing micro-organism.
2) to isolate the antibiotic gene
3) to join antibiotic gene with E.coli plasmid. Show Answer

Q46) Consider the following elements :
1) Copper
2) Gold
3) Platinum
4) Silver
Which of the above elements exist free in nature?
Show Answer

Q47) Consider the following statements :
Nitrogen is an essential constituent of
1) soil
2) animals
3) plants
Which of the statement(s) given above is/are correct ? Show Answer

Q48) When iron is left exposed in open air, it gets rusted. Which constituent(s) of air is/are responsible of rusting iron?
1) Oxygen gas present in air.
2) Moisture present in air.
3) Carbon dioxide gas present in air.
Select the correct answer using the code given below:
Show Answer

Q49) Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
1) Good thermal conductivity
2)Good electrical conductivity
3) Ductility
4) High melting point Show Answer

Q50) What happen when calcium is treated with water ?
1) It does not react with water
2) It reacts violently with water
3) It reacts less violently with water
4) Bubble of hydrogen gas formed stick to the surface of calcium. Show Answer

Q51) Metals are refined by using different methods. Which of the following metals are not refined by electrolytic refining
1)Au
2) Cu
3) Na
4) K
Show Answer

Q52) Which of the following metals are obtained by electrolysis of their chlorides in molten state?
1) Na 2) Ca 3) Fe 4) Cu Show Answer

Q53) An electrolytic cell consist of
1) positively charge cathode
2) negatively charged anode
3) positively charged anode
4) negatively charged cathode Show Answer

Q54) Consider the following statements :
1) Metals can form positive ions by losing electrons to non-metals.
2) Different metals have same reactivities with water and dilute acids.
3) A more reactive metal displaces a less reactive metal from its salt solution.
Which of these statement are correct?
Show Answer

Q55) Consider the following statements :
1) Mercury and zinc are purified by liquation method.
2) The presence of carbon in pig iron it very hard.
Which of these statements are correct?
Show Answer

Q56) Consider the following statements :
1) Solid NaCl conducts electricity.
2) Bauxite is purified by chemical separation.
3) Copper is purified by electrolytic refining.
Which of these statements are correct? Show Answer

Q57) Which of the statement about " Denaturation ' give below are correct?
1) Denaturation of proteins cause loss of secondary and tertiary structures of the protein
2) Denaturation leads to the conversion of double strand of DNA into single strand
3) Denaturation affects primary structure which gets distorted Show Answer

Q58) Which of the following statements about ribose are correct?
1) It is a polyhydroxy compound
2) It is an aldehyde sugar
3) It has six carbon atoms.
4) It exhibits optical activity . Show Answer

Q59) Assertion : Iron is found in the free state in nature.
Reason : Iron is highly reactive element.
Show Answer

Q60) Assertion : Leaching is a process of reduction.
Reason : Leaching involves treatment of the ore with a suitable regnant so as to make it soluble while impurities remains insoluble.
Show Answer

Q61) Assertion : Zinc is used in the galvanisation of iron.
Reason : Its coating on iron articles increases their life by protecting them from rusting. Show Answer

Q62) Assertion : Forth floatation process is based on the different wetting nature of ore and gangue particles.
Reason : Mustered oil is used as frother in forth flotation process. Show Answer

Q63) Assertion : In smelting, the roasted ore is heated with powdered coke in presence of flux.
Reason : Oxides are reduced to metals by C or CO and impurities are removed as slag.
Show Answer

Q64) Assertion : Valine is an essential amino acid.
Reason : The lack of essential amino acids in the diet causes Kwashiorkor. Show Answer

Q65) Assertion : Genetic engineering overcomes the drawbacks of traditional hybridisation.
Reason : Genetic engineering involves creation of a recombinant DNA and introduce the desirable genes into target organisms. Show Answer

Q66) The first metal used by man was Show Answer

Q67) Consider the following statements
1) The carat is a unit of purity for gold alloys.
2) 18 carat is a unit of purity gold and 6 parts another metal.
Which of the statement(s) given above is/are correct ? Show Answer

Q68) Salts of which of the following elements provide colours to fireworks ? Show Answer

Q69) For which ore froth floatation process is used ? Show Answer

Q70) Consider the following statements about calcium.
1) It forms basic oxide with air.
2) It floats over water.
3) It replaces sodium from sodium chloride.
The incorrect statements is/are Show Answer

Q71) Which of the following is calcined ? Show Answer

Q72) Consider the following statements.
1) When heated, proteins lost their primary structure
2) Alkaloids contain isoprene units.
The correct statement(s) is/are
Show Answer

Q73) Consider the following statements
1) Flavonoids are found in vascular plants.
2) Tannins are diuretics
The correct statement(s) is/are Show Answer

Q74) The reserve food for animals is Show Answer

Q75) The main constituents of cell wall is Show Answer

Q76) What is not true for carbohydrates ? Show Answer

Q77) Which of the following is not an essential amino acid for man ? Show Answer

Q78) Which of the following is not a function of proteins ? Show Answer

Q79) Charagaff's rule states that in an organism Show Answer

Q80) Which of the following ores are found in nature ?
1) Bauxite 2) Dolomite
3) Iron ore 4) Tin
Choose the correct answer using the codes given below Show Answer

Q81)
Which metal floats over water ? Show Answer

Q82) Sacrificial anode protects iron or ships, underground pipelines etc., from rusting, a process known
as cathodic protection. Which one of the following metals cannot be used as a sacrifical anode ? Show Answer

Q83) Assertion (A) Cellulose is used in making shatter proof glass.
Reason (R) Polysaccharides are not soluble in water. Show Answer

Q84) Solder is an alloy of Show Answer

Q85) The most abundant metal in the earth's crust is Show Answer

Q86) Stainless steel contains Show Answer

Q87) Which one of the following types of glass can cut off ultraviolet rays? Show Answer

Q88) Which one among the following is called philosophy wool? Show Answer

Q89) Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively? Show Answer

Q90) Which one of the following materials is very hard and very ductile ? Show Answer

Q91) Heaviest metal of the following is- Show Answer

Q92) What are Rubies and Sapphires chemically known as? Show Answer

Q93) Which of the following is an element : Show Answer

Q94) Assertion (A) : Sodium metal is stored under kerosene.
Reason (R) : Metallic sodium melts when exposed to air. Show Answer

Q95) Mica is a : Show Answer

Q96) In which of the following industries is mica used as a raw material Show Answer