Residence time of methane in the atmosphere is___________________?
A. 3 – 7 days
B. 2 -3 days
C. 3 – 7 years
D. 2 – 3 years
Submitted by :- Jamil Ahmed
CHEMISTRY
Prepare for your upcoming test with a comprehensive collection of Chemistry multiple-choice questions (MCQs), ranging from basic to advanced topics. These Chemistry MCQs cover various sections of the subject, providing you with valuable practice and boosting your chances of scoring well in the Chemistry portion of the test. Whether you’re a student or a job seeker preparing for exams, these MCQs will prove beneficial for your test preparation.
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Three elements needed for the healthy growth of plants are_________________?
A. N P K
B. N K C
C. N S P
D. N Ca P
Submitted by :- Jamil Ahmed
Which of the following is a macro nutrient ?
A. boron
B. iron
C. copper
D. carbon
Submitted by :- Jamil Ahmed
Ka<1-3 means______________?
A. Very strong base
B. Very weak acid
C. Very strong acid
D. Very strong salt
Submitted by :- Jamil Ahmed
Idea of pH and pOH was put forward by________________?
A. Gibbs
B. Einstein
C. Sorenson
D. Chadwick
Submitted by :- Jamil Ahmed
When the value of Kc is very small then_______________________?
A. reaction is at start
B. product conc. Is maximum
C. reactant conc. Is minimum
D. reaction is completed
Submitted by :- Jamil Ahmed
In case of gases Kc is replaced by_______________?
A. Ka
B. Kb
C. Kp
D. K
Submitted by :- Jamil Ahmed
At start of reaction the concentration of reactants is_______________?
A. high
B. low
C. according to Kc
D. constant
Submitted by :- Jamil Ahmed
Chemical equilibrium state is_______________?
A. dynamic state
B. static state
C. free state
D. unidirectional state
Submitted by :- Jamil Ahmed
Which substance can be used for disinfecting water ?
A. KMnO4
B. Alums
C. Ozone
D. All
Submitted by :- Jamil Ahmed