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Is diamond a metal or non-metal?

Diamond is not considered as a non-metal in the exceptional category as diamond is a form of carbon. It is... View Article

What happens if you put copper sulphate crystals in water?

If copper sulphate crystals are added to water then, the particles of copper sulphate crystals loses attraction between them and... View Article

What happens when a mixture of Cu₂O and Cu₂S is heated?

Heating a mixture of Cu2O and Cu2S will give Cu+SO2. Copper is a metal with low reactivity. Hence, it can... View Article

How the Nitrogen deficiency of soil can be removed?

Answer: What is deficiency in plants? Deficiency is the lack of something or the conditions which fails to meet the... View Article

What is natural and artificial indicator? Give some examples.

Natural indicators are those indicators which obtained from natural sources are called natural indicators. Eg- litmus, turmeric, red cabbage, beetroot... View Article

The metal whose salts are sensitive to light is? (A) Zinc (B) Silver (C) Copper (D) Aluminium

Answer: (B) Silver The salts formed by silver are sensitive to light. The silver salts are formed between silver and one... View Article

How much per cent above the cost price should a shopkeeper marks his goods so that after allowing a discount of 20% on the Marked price, he gains 12%

Let us assume the CP be Rs. 100 Let the MP be Rs. x Gain % after discount= 12% Gain... View Article

Prove that a cyclic parallelogram is a rectangle

Let ABCD be a cyclic quadrilateral such that its diagonals AC and BD are the diameters of the circle through... View Article

The associative property is applicable to:- (a) Addition and subtraction (b) Multiplication and division (c) addition and multiplication (d) subtraction and division

Answer: (c) addition and multiplication This property states that when three or more numbers are added (or multiplied), the sum (or... View Article

Find the value of cos (18 degrees)

Let A = 18° 5A = 90° 2A = 90 – 3A Sin 2A = Sin (90-3A) = Cos 3A... View Article

Which term of an AP 21, 18, 15, …. is zero?

Answer: A mathematical sequence in which the difference between two consecutive terms is always a constant is known as Arithmetic Progression. It... View Article

Which term of AP 53, 48, 43… is the first negative term?

Answer: A mathematical sequence in which the difference between two consecutive terms is always a constant is known as Arithmetic Progression. It... View Article

The number of significant figures in 0.06900 is (a) 5 (b) 4 (c) 2 (d) 3

The significant figures of a number are those which adds the valuable importance to the number. The number of significant... View Article

Solve: 6xy – 4y + 6 – 9x.

Given the expression 6xy-4y+6-9x We have to factorize the above expression Expression: 6xy–4y+6–9x = 6xy–9x–4y+6 Taking 3x common from the... View Article

What is the additive inverse of -(-2/3)?

Additive inverse means the number when added to a certain number we get the sum zero. Additive inverse An additive inverse of... View Article

2 women and 5 men can together finish an embroidery work in 4 days, while 3 women and 6 men can finish it in 3 days. Find the time taken by 1 women alone to finish the work , and also that taken by 1 man alone.

Let the number of days taken by a woman and a man be x and y. ⇒ 4(2/x + 5/y)... View Article

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