Question Answers

A positive integer is of the form 3q + 1, q being a natural number. Can you write its square in any form other than 3m + 1, i.e., 3m or 3m + 2 for some integer m? Justify your answer 3m or 3m + 2 for some integer m? Justify your answer A positive [...]

Write whether the square of any positive integer can be in the form 3m + 2 where m is natural number. justify your answer Write whether the square of any positive integer can be in the form 3m + 2 where m is natural number. justify your answer November 22, 2020 Category: Chapter 1 - [...]

The product of three consecutive positive integers is divisible by 6′. Is this statement true or false ? Justify your answer. The product of three consecutive positive integers is divisible by 6'. Is this statement true or false ? Justify your answer. November 22, 2020 Category: Chapter 1 - Real Numbers , Maths , NCERT [...]

The rest mass of 1 mol of neutrons (Mn = 1.675 x 10^-27 kg ) is (a) 1.800 x 10^-3 kg (b) 1.008 x 10^-4 kg (c) 1.080 x 10^-3 kg (d) 1.008 x 10^-3 kg The rest mass of 1 mol of neutrons (Mn = 1.675 x 10^-27 kg ) is (a) 1.800 x [...]

The product of two consecutive integers is divisible by 2. Is this statement true or false ? Give Reason. The product of two consecutive integers is divisible by 2. Is this statement true or false ? Give Reason. November 22, 2020 Category: Chapter 1 - Real Numbers , Maths , NCERT Class 10 ,

The number of moles of BaCO3 which contain 1.5 moles of oxygen atoms is (a) 0.5 (b) 1 (c) 3 (d) 6.02 x 10^23 The number of moles of BaCO3 which contain 1.5 moles of oxygen atoms is (a) 0.5 (b) 1 (c) 3 (d) 6.02 x 10^23 November 22, 2020 Category: Uncategorised (JEE Advanced [...]

250 ml of a sodium carbonates contains 2.65 g of Na2 CO3. If 10 ml of this solution is diluted to one litre, what is the concentration of the resulatant solution (mol. wt. of Na2CO3 = 106 ) 250 ml of a sodium carbonates contains 2.65 g of Na2 CO3. If 10 ml of this [...]

The number of water molecules in 1 litre of water is (a) 18 (b) 18 x 1000 (c) Na (d) 55.55 Na The number of water molecules in 1 litre of water is (a) 18 (b) 18 x 1000 (c) Na (d) 55.55 Na November 22, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma [...]

Write whether every positive integers can be of the form 4q+2 , where q is an integer. justify your answer . where q is an integer. justify your answer . Write whether every positive integers can be of the form 4q+2 November 22, 2020 Category: Chapter 1 - Real Numbers , Maths , NCERT Class [...]

Which of the following is the lightest (a) 0.2 mole of hydrogen gas (b) 6.023 x 10^22 ,olecules of nitrogen (c) 1.0 g of silver (d) 0.1 mole of oxygen gas (e) 1 g of water olecules of nitrogen (c) 1.0 g of silver (d) 0.1 mole of oxygen gas (e) 1 g of water [...]