chemistry MCQs – Page 52

Practise multiple-choice questions from chemistry for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemistry Mcqs
1021. Which of the following will be acidic_____________?
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A. propyne

B. all of the above

C. ethyne

D. 1-butyne

1022. Which one of the following is also known as tartaric acid ?
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A. 2 3 -dihydroxy butanioc acid

B. 2 2 -dihydroxy butanoic acid

C. 2 3 -dihydroxy butanedioic acid

D. 2 3-dihydroxy butance 1 4 -dioic acid
1023. When one hydrogen atom of alkane is removed then it is called________________?
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A. alkyl

B. aldehyde

C. alkene

D. saturated hydrocarbon

1024. Which of the following statements is incorrect about fluorine_______________?
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A. fluorine is restricted to -1 oxidation state

B. fluorine follows octet rule and as well as extended octet rule

C. fluorine has lowest dissociation energy among the halogens

D. both B and C
1025. Alkenes are produced from dehalogenation of________________?
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A. vicinal dihalo alkane

B. trihalo alkane

C. vicinal trihalo alkane

D. dihalo alkane

1026. Gypsum is______?
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A. CaSO4,2H2O

B. CaSO4.3H2O

C. CaSO4

D. CaSO4.1/2H2O

1027. The relatively high energy of the gauche conformation of butane is primarily associated with_________?
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A. Steric strain

B. Angle strain

C. Orbital strain

D. Torsional strain

1028. Soda lime is a mixture of____________________?
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A. Na2O and KOH

B. CaO and KOH

C. CaO and NaOH

D. NaOH and Na2O

1029. The valency of carbon Atom is __________ ?
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A. 4

B. 2

C. 1

D. 3

1030. Which one of the following is caustic potash?
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A. NaBH4

B. NaOH

C. KOH

D. NaCl

1031. Ethers show functional group isomerism with __________________?
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A. aldehydes

B. alcohols

C. ketones

D. carboxylic acid

1032. The number of d-electrons in Fe2+ (Z = 26) is not equal to that of____________?
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A. p-electrons in Ne(Z = 10)

B. s-electrons in Mg(Z = 12)

C. p-electrons in CI(Z = 17)

D. d-electrons in Fe(Z = 26)

1033. Which among the following is not a property of Ionic bond _________?
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A. Gain of electrons

B. Sharing of electrons

C. Losing of electrons

D. Transfer of electrons

1034. In melting of iron, which of the following reactions takes place in Bladt Furnace at 400C- 600C________?
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A. CaO+ SiO2> CaSiO3

B. Fe2O3+ 3CO> 2Fe+ 3CO2

C. FeSiO3> FeSiO3

D. 2FeS+3O2> 2Fe+ SO2

1035. The reciprocal of the coefficent of viscosity is called__________?
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A. Specific gravity

B. Density

C. Fluidity

D. Absorbance

1036. The PH of milk is __________?
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A. 6

B. 7

C. 0.5

D. 6.5
1037. The heat required to raise the temperature of body by 1 K is called___________?
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A. None of the above

B. specific heat

C. thermal capacity

D. water equivalent

1038. The PH of pure water at 25C, kw=110-4____________?
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A. 0

B. 7

C. 14

D. None of above

1039. Methanol can be obtained from_________________?
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A. destructive distillation of wood

B. all

C. methane

D. water gas

1040. K2Cr2O7/H2SO4 generate____________________?
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A. Oxygen

B. Nascent oxygen[O]

C. Nascent hydrogen[H]

D. Hydrogen