Question
A boy focuses a sharp image of a distant object on a
screen using a lens. The distance between the lens and screen is approximately equal to:Solution
The correct answer is C
Which of the following is the most abundant element on earth?
If water smells bad, then that odor can be removed by adding:
Which of the following statement is/are true?
I. Atomic radius increases in moving from left to right along a period.
II. Atomic size...
Which dating method is commonly used to determine the age of materials from prehistoric times?
In which form is iron ore primarily found in nature?
The conversion of hard water into soft water by boiling or adding calcium hydroxide is called:
Anesthesia which is administered during the surgeries in the hospitals is a mixture of which of the following gases?
What does a catalyst do in a reaction?
Which of the following element is used for the manufacture of the safety-matches?
The anode in a dry cell consists of:
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