Chemistry Questions

Q:

Which among the following cannot be included among greenhouse gases?

A) Nitrous Oxide B) Carbon Dioxide
C) Methane D) Phosphine
 
Answer & Explanation Answer: D) Phosphine

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Q:

Which of the following meals is NOT obtained by reduction using carbon?

A) Copper B) Sodium
C) Iron D) Zinc
 
Answer & Explanation Answer: B) Sodium

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Q:

What charge is present on a neutron?

A) positive B) negative  
C) no charge D) No option is correct
 
Answer & Explanation Answer: C) no charge

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Q:

The state of matter can be changed into another state by changing the

A) Volume B) Density
C) Shape D) Temperature
 
Answer & Explanation Answer: D) Temperature

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Q:

Atomic mass of Carbon is 12 and that of Helium is 4. State which of the following statements is true for 1 mole of each of the elments?

A) 1 mole of Helium will contain 3 times more atoms than 1 mole of Carbon B) 1 mole of Carbon will contain the same number of atoms as present in 1 mole of Helium
C) 1 mole of Carbon will contain one-third the number of atoms present in 1 mole of Helium D) 1 mole of Carbon will contain 3 times more atoms than 1 mole of Helium
 
Answer & Explanation Answer: B) 1 mole of Carbon will contain the same number of atoms as present in 1 mole of Helium

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Q:

What is the number of atoms constituting a molecule known as?

A) Atomicity B) Atomic mass
C) Atomic number D) Isotopes
 
Answer & Explanation Answer: A) Atomicity

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Q:

Galvanization a process to prevent rusting involves use of ___ coating to steel or iron.

A) Nickel B) Magnesium
C) Copper D) Zinc
 
Answer & Explanation Answer: D) Zinc

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Q:

How are elements arranged in the Modern Periodic Table?

A) In the increasing order of their Molecular Mass B) In the increasing order of their Atomic Mass
C) In the increasing order of their Atomic Number D) In the increasing order of their Mass Number
 
Answer & Explanation Answer: B) In the increasing order of their Atomic Mass

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