A) Graphite
B) Boron
C) Cadmium
D) Lead
Answer: A) Graphite
Category: Full List
The chemical used to preserve biological specimens is:
A) Formaldehyde
B) Chloroform
C) Acetone
D) Benzene
Answer: A) Formaldehyde
Which vitamin is essential for the synthesis of clotting factors in liver?
A) Vitamin A
B) Vitamin D
C) Vitamin E
D) Vitamin K
Answer: D) Vitamin K
The unit of electric resistance is:
A) Watt
B) Coulomb
C) Ohm
D) Volt
Answer: C) Ohm
Which blood component helps in clotting?
A) Plasma
B) Red blood cells
C) White blood cells
D) Platelets
Answer: D) Platelets
Which part of the electromagnetic spectrum has the shortest wavelength?
A) Gamma rays
B) X-rays
C) Ultraviolet rays
D) Infrared rays
Answer: A) Gamma rays
The most abundant greenhouse gas naturally present in the Earth’s atmosphere is:
A) Carbon dioxide
B) Methane
C) Nitrous oxide
D) Water vapor
Answer: D) Water vapor
Which organelle contains its own DNA and ribosomes apart from the nucleus?
A) Lysosome
B) Mitochondria
C) Golgi apparatus
D) Endoplasmic reticulum
Answer: B) Mitochondria
The second law of thermodynamics is related to:
A) Conservation of momentum
B) Entropy increase
C) Energy conservation
D) Mass-energy equivalence
Answer: B) Entropy increase
The half-life of Carbon-14 is about:
A) 2730 years
B) 3500 years
C) 5730 years
D) 7500 years
Answer: C) 5730 years