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question_answer1)
Which of the following reacts with cold water vigorously?
A)
carbon done
clear
B)
sodium done
clear
C)
magnesium done
clear
D)
sulphur done
clear
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question_answer2)
Which of the following non-metals has shining lustrous surfaces?
A)
Graphite and phosphorus done
clear
B)
Graphite and iodine done
clear
C)
Iodine and phosphorus done
clear
D)
Phosphorus and chlorine done
clear
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question_answer3)
A non-metal that catches fire at room temperature is-
A)
Sodium done
clear
B)
Sulphur done
clear
C)
Phosphorus done
clear
D)
Fluorine done
clear
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question_answer4)
Which of the following metals on reacting with sodium hydroxide solution produce hydrogen gas?
A)
B and C done
clear
B)
A and D done
clear
C)
B and D done
clear
D)
B only done
clear
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question_answer5)
Which are the most abundant elements in the universe? [NDA]
A)
Oxygen and Nitrogen done
clear
B)
Hydrogen and Oxygen done
clear
C)
Hydrogen and Helium done
clear
D)
Carbon and Nitrogen done
clear
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question_answer6)
What is the colour of oxygen in solid state? [NDA]
A)
Pale yellow done
clear
B)
Pale blue done
clear
C)
Light green done
clear
D)
Greenish yellow done
clear
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question_answer7)
Why is nitrogen molecule chemically less active? [NDA]
A)
It has small atomic radius done
clear
B)
It has high electronegativity done
clear
C)
It has high dissociation energy done
clear
D)
It has stable electronic configuration done
clear
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question_answer8)
Yellow colour of usual nitric acid is due to the presence of which one of the following? [NDA]
A)
\[{{N}_{2}}O\] done
clear
B)
NO done
clear
C)
\[{{N}_{2}}{{O}_{5}}\] done
clear
D)
\[N{{O}_{2}}\] done
clear
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question_answer9)
Which one of the following elements cannot displace hydrogen gas from a dilute acid? [NDA]
A)
Zinc done
clear
B)
Copper done
clear
C)
Magnesium done
clear
D)
Iron done
clear
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question_answer10)
Which of the following is not a nitrogenous fertilizer? [NDA]
A)
\[Ca{{(CN)}_{2}}\] done
clear
B)
\[CaC{{N}_{2}}\] done
clear
C)
\[N{{H}_{4}}N{{O}_{3}}\] done
clear
D)
Urea done
clear
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question_answer11)
Which one of the following is the correct order in which the gases \[{{H}_{2}},Ne,{{O}_{2}}\] and \[{{N}_{2}}\]are evolved on fractional distillation of liquid air? [NDA]
A)
\[{{H}_{2}},Ne,{{O}_{2}},{{N}_{2}}\] done
clear
B)
\[{{H}_{2}},Ne,{{N}_{2}},{{O}_{2}}\] done
clear
C)
\[{{N}_{2}},{{O}_{2}},Ne,{{H}_{2}}\] done
clear
D)
\[{{O}_{2}},{{N}_{2}},{{H}_{2}},Ne\] done
clear
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question_answer12)
Which of the following is an element which never exhibits positive oxidation state in any of its compounds? [NDA]
A)
Oxygen done
clear
B)
Chlorine done
clear
C)
Fluorine done
clear
D)
Carbon done
clear
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question_answer13)
Oxygen and ozone are [NDA]
A)
allotropes done
clear
B)
isomers done
clear
C)
isotopes done
clear
D)
isobars done
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question_answer14)
A glass of water does not turn into ice as it reaches \[0\text{ }{}^\circ C\]. It is because [NDA]
A)
water does not solidify at \[0\text{ }{}^\circ C\] done
clear
B)
a certain amount of heat must be supplied to the glass of water so as to solidify done
clear
C)
a certain amount of heat must be taken out from the glass of water so as to solidify done
clear
D)
water solidifies at 0 K only done
clear
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question_answer15)
Which one among the following does not have an allotrope? [NDA]
A)
Oxygen done
clear
B)
Sulphur done
clear
C)
Nitrogen done
clear
D)
Carbon done
clear
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question_answer16)
Deionised water is produced by [NDA]
A)
Calgon process done
clear
B)
Ion-exchange resin process done
clear
C)
Clark's process done
clear
D)
Permutit process done
clear
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question_answer17)
Which one of the following is the secondary source of light in a fluorescent lamp? [CDS]
A)
Neon gas done
clear
B)
Argon gas done
clear
C)
Mercury vapour done
clear
D)
Fluorescent coating done
clear
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question_answer18)
Which one of the following is the softest? [CDS]
A)
Sodium done
clear
B)
Aluminium done
clear
C)
Iron done
clear
D)
Copper done
clear
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question_answer19)
Which among the following elements is abundant on the lunar surface and holds the potential to put an end to the energy crisis of the earth? [CDS]
A)
Helium-I done
clear
B)
Helium-II done
clear
C)
Helium-III done
clear
D)
Helium-IV done
clear
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question_answer20)
Which allotropy of carbon is in rigid three- dimensional structure? [CDS]
A)
Graphite done
clear
B)
Fullerene done
clear
C)
Diamond done
clear
D)
Carbon black done
clear
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question_answer21)
What are the elements which are liquids at room temperature and standard pressure? [CDS]
1. Helium |
2. Mercury |
3. Chlorine |
4. Bromine |
Select the correct answer using the codes given below
A)
2 and 3 done
clear
B)
2, 3 and 4 done
clear
C)
2 and 4 done
clear
D)
1 and 3 done
clear
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question_answer22)
The form of carbon known as graphite [CDS]
A)
is harder than diamond done
clear
B)
contains a higher percentage of carbon than diamond done
clear
C)
is a better electrical conductor than diamond done
clear
D)
has equal carbon-to-carbon distances in all directions done
clear
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question_answer23)
Which one of the following is also called Stranger Gas? [IAS Prelim]
A)
Argon done
clear
B)
Neon done
clear
C)
Xenon done
clear
D)
Nitrous oxide done
clear
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question_answer24)
Statement I: Soaps do not form lather with water containing salts of calcium and magnesium. |
Statement II: Calcium and magnesium salts of long chain fatty acids are insoluble in water. |
A)
Both the statements are individually true and Statement II is the correct explanation of Statement I. done
clear
B)
Both the statements are individually true but Statement II is not the correct explanation of Statement I. done
clear
C)
Statement I is true, but Statement II is false. done
clear
D)
Statement I is false, but Statement II is true. done
clear
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