The nitrogen present in some fertilizers helps plants.
- to fight against diseases
- to produce protein
- to undergo photosynthesis
- to produce fat
Submitted by :- Muhammad Nawaz
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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Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________?
A. oxidation
B. elimination
C. condensation polymerization
D. additional polymerization
Submitted by :- Jamil Ahmed
What is the percentage of nitrogen in urea?
- 46%
- 77%
- 88%
- 23%
Submitted by :- Muhammad Nawaz
Heating phenol with Zn will yield_________________?
A. Benzene
B. Benzoic acid
C. Phenoxide
D. Cyclohexane
Submitted by :- Jamil Ahmed
Which is ideal for horticultural crops and for tobacco and potatoes.
- Potassium Nitrate
- Potassium chloride
- Potassium sulphate
- None of these
Submitted by :- Muhammad Nawaz
Which compound is also known by the name of carbolic acid ?
What is the percentage of nitrogen in ammonium sulphate?
- 21
- 27
- 23
- 19
Submitted by :- Muhammad Nawaz
Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate ?
A. Primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. All of above
Submitted by :- Jamil Ahmed
What is the percentage of nitrogen in ammonium nitrate?
- 80-82
- 50-55
- 20-25
- 32-35
Submitted by :- Muhammad Nawaz
K2Cr2O7/H2SO4 generate____________________?
A. Oxygen
B. Hydrogen
C. Nascent oxygen[O]
D. Nascent hydrogen[H]
Submitted by :- Jamil Ahmed