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General Science - Questions and Answers

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781. The anti-knocking compound used in pettol-engines is :
A. diethyl Lead
B. tetra-ethyl Lead
C. triethyl Lead
D. mono ethyl Lead
Explanation:
782. Clear nights are colder than cloudy nights because of
A. conduction
B. condensation
C. radiation
D. insolation
Explanation:
783. The essential element in all organic compounds is
A. nitrogen
B. sulphur
C. carbon
D. chlorine
Explanation:
784. Which one of the following fertilizers has more nitrogen content ?
A. Urea
B. Ammonium Nitrate
C. Potassium Nitrate
D. Ammonium Phosphate
Explanation:
785. The fresh urine has no smell while after some time it develops a strong odour because :
A. the urea of the fresh urine is converted into uric acid.
B. the uric acid of the fresh urine is converted into urea.
C. conversion of urea to ammonia by bacteria
D. conversion of uric acid to creatinine by bacteria.
Explanation: