A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.For each of the following multiple choice questions, choose the most appropriate answer :
1. Polythene is industrially prepared by the polymerization of
A. methane
B. acetylene
C. ethylene
D. ethane
2. Anaemia occurs due to the lack of
A. iodine
B. calcium
C. potassium
D. iron
3. The incorrect statement in respect of Chromyl chloride test is
A. liberation of Chlorine
B. formation of red vapours
C. formation of Chromyl chloride
D. formation of lead chromate
4. Which is the most easily liquifiable rare gas?
A. Kr
B. Xe
C. Ar
D. Ne
5. The product obtained reacts with Phenyl hydrazine but does not answer silver mirror test. The possible structure of X is
A. CH3CH2OH
B. (CH3)2CHOH
C. CH3 ¾ ¾ CH3
D. CH3CHO
6. Lime water contains
A. sodium hydroxide
B. calcium hydroxide
C. sodium carbonate
D. calcium chloride
7. The reaction C2H5ONa + C2H5I ® C2H5OC2H5 + NaI is known as
A. Wurtz's synthesis
B. Williamson's synthesis
C. Kolbe's synthesis
D. Grignard's synthesis
8. In Tollen's test, aldehydes
A. Are oxidised to acids
B. Are reduced to alcohol
C. Precipitate Ag+ as AgCI
D. Neither reduced nor oxidised
9. 2 g of organic compound on Kjeldahilization liberates ammonia which consumes 30 cm3 of 1 N HCl. The percentage of nitrogen in the organic compound is
A. 30
B. 46.67
C. 35
D. 20.8
10. The correct order of ionisation energy of C, N, O, F is
A. C < N < O < F
B. F < O < N < C
C. F < N < C < O
D. C < O < N < F
11. Denatured alcohol is
A. Rectified spirit
B. Undistilled ethanol
C. Rectified spirit + methanol + naphtha
D. Ethanol + methanol
12. Which of the following has the highest bond order?
A. He2
B. O2
C. H2
D. N2
13. Among the alkali metals cesium is the most reactive because
A. the outermost electron is more loosely bound than the outermost electron of the other alkali metals
B. it is the heaviest alkali metal
C. its incomplete shell is nearest to the nucleus
D. it has a single electron in the valence shell
14. Which of the following is an intensive property?
A. temperature
B. surface tension
C. viscosity
D. All of these
15. The substance whose aqueous solution would be a conductor of electricity than water is
A. cane sugar
B. glucose
C. common salt
D. ethyl alcohol
16. During the adsorption of krypton on activated charcoal at low temperature,
A. DH > 0 and DS > 0
B. DH < 0 and DS > 0
C. DH < 0 and DS < 0
D. DH > 0 and DS < 0
17. Number of isomeric forms (constitutional and sterioisomers) for [Rh(en)2(NO2)(SCN)]+ are
A. Six
B. Twelve
C. Three
D. Nine
18. Which of the following has the maximum number of unpaired 'd' electrons?
A. Zn2+
B. Ni3+
C. Fe2+
D. Cu+
19. Amines behave as
A. aprotic acid
B. Lewis acids
C. Lewis base
D. neutral compound
20. Of the following, the content of carbon is minimum in
A. steel
B. pig iron
C. wrought iron
D. cast iron
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