Chemistry Quiz

Oxidation is a process which involves _______________.
addition of oxygen
addition of hydrogen
removal of oxygen
Both A and B
Assertion (A): Decomposition reactions are called opposite of combination reactions.
 
Reason (R): In decomposition reaction, a reactant compound is broken down into two or more products whereas in a combination reaction two or more elements or compounds combine together form a single new compound.
A is true but R is false.
A is false but R is true.
Both A and R are true, R is the correct explanation for A.
Both A and R are true, R is not the correct explanation for A.

Assertion(A): When a red litmus paper is kept in a solution of sodium hydroxide, it changes colour to blue.

Reason( R) : Red litmus paper turns blue in acidic medium.
A is true but R is false.
A is false but R is true.
Both A and R are true, R is the correct explanation for A.
Both A and R are true, R is not the correct explanation for A.
Find the odd one out from the following.
Lemon
Bitter Gourd
Curd
Vinegar
Diamond, graphite and fullerene are ____________ of carbon.
The substances which are capable of reacting with both acid as well as bases are called ___________ oxide.
Which of the following is the correct formula of an alkyne having four carbon atoms.
C₅H₁₀
C₄H₆
C4H8
C4H10
The molecular formula of methane is CH4. Carbon forms four _________________ bonds with four hydrogen atoms.

Assertion(A) : The elements of group 18 in the modern periodic table do not react with other elements.

Reason(R) : The elements in group 18 have zero valency.

A is true but R is false.
A is false but R is true.
Both A and R are true, R is the correct explanation for A.
Both A and R are true, R is not the correct explanation for A.
The valency of group 14 elements in the periodic table is four.
True
False
0
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