Practice MCQ Questions and answers on Chemistry-GK Page-10 section-6

Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Section 8 Section 9 Section 10 Section 11 Section 12

91.
Which one is the most reactive gaseous element?

A. Chlorine

B. Bromine

C. Iodine

D. Flourine

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92.
Which of the following metals occurs in free state ?

A. Copper

B. Iron

C. Zinc

D. Lead

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93.
The “King of Metals” is :

A. Gold

B. Silver

C. Iron

D. Aluminium

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94.
Which of the following metals is used in Space Crafts to withstand high temperatures ?

A. Fe

B. Ti

C. Ni

D. Pb

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95.
Phosphorus is kept in water because

A. Its ignition temperature is very high

B. Its ignition temperature is very low

C. Its critical temperature is high

D. Its critical temperature is low

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96.
The element which is used for vulcanizing rubber

A. Sulphur

B. Bromine

C. Silicon

D. Phosphorus

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97.
Chemically ‘Quick Silver' is known as

A. Mercury

B. Silver

C. Aluminium

D. Copper

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98.
The weight of 6.023 × 10²³ atoms of carbon is

A. 12 gms

B. 120 gms

C. 1.2 gms

D. 0.12 gms

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99.
If there is one million Mg²⁺ ions in MgCl_{2_{, how many chloride ions are there?}}

A. Two million

B. One million

C. Half a million

D. Ten million

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100.
What is the mass percentage of carbon in carbon dioxide (CO₂)?

A. 15.8 %

B. 20.1 %

C. 27.3 %

D. 32.3 %

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Practice MCQ Questions and answers on Chemistry-GK

91. Which one is the most reactive gaseous element?

Answer & Solution

92. Which of the following metals occurs in free state ?

Answer & Solution

93. The “King of Metals” is :

Answer & Solution

94. Which of the following metals is used in Space Crafts to withstand high temperatures ?

Answer & Solution

95. Phosphorus is kept in water because

Answer & Solution

96. The element which is used for vulcanizing rubber

Answer & Solution

97. Chemically ‘Quick Silver' is known as

Answer & Solution

98. The weight of 6.023 × 1023 atoms of carbon is

Answer & Solution

99. If there is one million Mg2+ ions in MgCl2, how many chloride ions are there?

Answer & Solution

100. What is the mass percentage of carbon in carbon dioxide (CO2)?

Answer & Solution

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91.
Which one is the most reactive gaseous element?

92.
Which of the following metals occurs in free state ?

93.
The “King of Metals” is :

94.
Which of the following metals is used in Space Crafts to withstand high temperatures ?

95.
Phosphorus is kept in water because

96.
The element which is used for vulcanizing rubber

97.
Chemically ‘Quick Silver' is known as

98.
The weight of 6.023 × 10²³ atoms of carbon is

99.
If there is one million Mg²⁺ ions in MgCl_{2_{, how many chloride ions are there?}}

100.
What is the mass percentage of carbon in carbon dioxide (CO₂)?