(A) Photochemistry
(B) Chemical kinetics
(C) Thermodynamics
(D) Electrochemistry
The Answer is : (B) Chemical kinetics
Category: Chemistry MCQs Class 11
Chemistry MCQs questions with answers of class 11 or first year. HSSC Part-I chemistry multiple choice questions from past papers.
The bonds present in ethene (C2H4) molecule is:
The bonds present in ethene (C2H4) molecule
(A) Five σ bond and one π bond
(B) Two σ bond and two π bond
(C) Three σ bonds and two π bonds
(D) All σ bonds
Answer(A) Five σ bond and one π bond
Rain drops have spherical shape because a sphere has the least?
(A) Area
(B) Volume
(C) Length
(D) Surface to volume ratio
Answer: (D) Surface to volume ratio
Ice floats on top of water because its density is:
(A) Lesser than density of water
(B) Equal to density of water
(C) Greater than density of water
(D) All of them
Answer: (A) Lesser than density of water
Which molecule has linear structure:
(A) CH4
(B) NH3
(C) BF3
(D) C2H2
Answer: (D) C2H2