General MCQs
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Q321.B12 deficiency can produce____?
Correct Answer: C
Vitamin B12 deficiency can lead to pernicious anemia, characterized by insufficient healthy red blood cells.
Q322.Balloons are filled with ____ ?
Correct Answer: B
Balloons (like party or weather balloons) are commonly filled with helium, a gas lighter than air.
Q323.Bamboo is a____?
Correct Answer: B
Bamboo, despite its woody appearance, is botanically classified as a grass.
Q324.Barnacles growing on the back of whale is an example for ____?
Correct Answer: D
Barnacles growing on a whale's back is a classic example of commensalism, where the barnacle benefits (transport, food access) without harming the whale.
Q325.Basha Dam is to be constructed on____?
Correct Answer: D
The Basha Dam (Diamer-Bhasha Dam) is being constructed on the Indus River in Gilgit-Baltistan, Pakistan.
Q326.Basidiospores are considered to be a major source of ____?
Correct Answer: A
Basidiospores, released by certain fungi, are a major source of airborne allergens that can trigger respiratory allergies.
Q327.Bats can also fly in dark because they are capable of taking the help of ____?
Correct Answer: B
Bats navigate and hunt in the dark using echolocation — emitting ultrasonic waves and interpreting their echoes.
Q328.Bauxite is an ore of____?
Correct Answer: C
Bauxite is the primary ore from which aluminium is extracted.
Q329.BCG vaccine is used to produce immunity against____?
Correct Answer: B
The BCG vaccine provides immunity against tuberculosis (TB).
Q330.Beaufort Scale” is used to measure____?
Correct Answer: A
The Beaufort Scale is used to measure and describe wind speed/velocity based on observed sea or land conditions.
Q331.Being Myopic means you have problem in seeing ____?
Correct Answer: A
Myopia (nearsightedness) causes difficulty in clearly seeing distant objects, while close objects remain clear.
Q332.Big Bang was an explosion that occurred ?
Correct Answer: B
The Big Bang is estimated to have occurred roughly 13.8 billion years ago (often cited historically as approximately 15 billion years).
Q333.Biggest award in the field of science is the ____?
Correct Answer: A
The Nobel Prize is widely regarded as the biggest and most prestigious award in the field of science.
Q334.Black gold is an oil; Black diamond is____?
Correct Answer: C
Just as petroleum oil is called 'black gold,' coal is often referred to as 'black diamond' due to its economic value.
Q335.Bleaching action of chlorine is by____?
Correct Answer: A
Chlorine's bleaching action works through oxidation, breaking down colored compounds into colorless ones.
Q336.Bleaching powder contains____?
Correct Answer: C
Bleaching powder (calcium hypochlorite) contains chlorine as its active bleaching agent.
Q337.Boiling of an egg is a change which is____?
Correct Answer: B
Boiling an egg is a chemical change, since heat causes irreversible denaturation of the proteins inside.
Q338.Boiling point of pure water is ____?
Correct Answer: C
The boiling point of pure water at standard atmospheric pressure is 100°C.
Q339.Bolometer measures: ____?
Correct Answer: C
A bolometer is an instrument used to measure the intensity of heat radiation.
Q340.Bore is caused by____?
Correct Answer: A
A tidal bore is caused by a rising tide surging up a narrowing river channel and meeting the river's outgoing current.