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Find a and b if (a+ib) (1+i) = 2+i

Solution: Given (a+ib) (1+i) = 2+i => a+ib+ai-b = 2+i Comparing real and imaginary terms a-b = 2…(i) a+b =... View Article

What is the chemical formula of ferrous sulphate?

Answer: Chemical formula of ferrous sulphate is FeSO4.

When sodium sulphate solution reacts with barium chloride solution, the solution after the reaction contains

(a) Barium sulphide (b) Sodium chloride (c) both a and b (d) none of a and b Solution: The... View Article

What is the difference between plant tissue and animal tissue (in tabular form).

Plant tissue Animal tissue Cells of plant tissue have cell wall. Cell wall is not present. Growth is restricted... View Article

A pie has to be divided amongst few kids. Puneet gets 2/7th portion of the pie and Sheela gets 5/8th portion of the pie. Who amongst the two gets lesser share?

Solution: We have to compare 2/7 and 5/8. These are unlike fractions. We have to convert them to like fractions... View Article

The motion of the earth around the sun is known as

(a) rotation (b) orbit (c) revolution (d) none of these Answer: The motion of the earth around the sun... View Article

Is energy a vector quantity?

Answer: Energy is not a vector quantity. It is a scalar quantity.

Give the structural formula for ethanal.

(a) CH3CHO (b) HCHO (c) CH2CO (d) CH3CH2O Solution: The structural formula of ethanal is CH3CHO. Hence option a... View Article

Give the feminine gender of these nouns:

1. waiter – waitress 2. monk – nun 3. stag – hind 4. colt – filly 5. master – mistress... View Article

Plaster of Paris hardens by

(a) giving off CO2 (b) changing into CaCO3 (c) giving out water (d) utilising water Solution: Plaster of Paris... View Article

What is the SI unit of wave number?

(a) m (b) m-1 (c) s (d) s-1 Solution: Wave number is the reciprocal of wavelength of a wave. It... View Article

Who founded the Nalanda University?

(a) Mauryan (b) Guptas (c) Harshavardhan (d) Chalukyas Answer: The correct answer is option (b) – Guptas. Nalanda University was... View Article

Before Delhi, which city was the capital of India under the British Raj?

(a) Madras (b) Mumbai (c) Kolkata Answer: Before Delhi, Kolkata was the capital of India under the British Raj Hence... View Article

The potential energy of a particle varies with distance x from a fixed origin as U = (A√x)/( x²+B), where A and B are dimensional constants , then find the dimensional formula for AB.

Solution: Given U = (A√x)/( x2+B) x is the distance . Unit of B is equal to unit of x2... View Article

ABCD is a square. PQRS is a square formed by joining the mid-points of AB, BC, CD, and AD respectively. EFGH is a square formed by joining the mid-points of PQ, QR, RS and PS respectively. Find the sum of the perimeters of ABCD, PQRS and EFGH if the area of square EFGH is 25cm².

Solution: Given area of square EFGH = 25cm2 Side of square EFGH, a = √25 = 5 cm Side of... View Article

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