(A) Wavelength
(B) Frequency
(C) Source if energy
(D) Wave number
Answer: (B) Frequency
The energy of each quantum of radiation is directly proportional to its frequency.
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 molarity of a solution containing 4gm NaOH dissolved in 10ml solution is:
(A) 0.4M
(B) 0.1M
(C) 10M
(D) 1.0M
Answer: (C) 10M
The net enthalpy change in a chemical reaction is same, whether it is brought about in two or more different ways in one or several steps. It is known as:
(A) Henry’s Law
(B) Joule’s Principle
(C) Hess’s Law
(D) Law of Conservation of energy
Answer: (C) Hess’s Law
The net enthalpy change in a chemical reaction is same, whether it is brought about in two or more different ways in one or several steps. It is known as “Hess’s Law”.
Which of the following compound does not contain hydrogen bonding:
(A) CH4
(B) HCl
(C) NH3
(D) HF
Answer: (B) HCl
The uncertainly principle is applied to:
(A) Aeroplane
(B) Cricket ball
(C) Electron
(D) Earth
The Answer is : (C) Electron