Last seen: Sep 10, 2021
(a) 2HNO3 + Ca(OH)2 ➝ Ca(NO3)2 + 2H2O (b) 2NaOH + H2SO4 ➝ Na2SO4 + 2H2O (c) The symbolic equation as given for the reaction is already balanced. ...
(i) Distance is a scalar quantity whereas displacement is a vector quantity. (ii) Distance is the total path covered by the body and displacement i...
Speed: (i) Speed is simply the rate of change of motion. (ii) Speed is the distance traveled by a body in a unit time. (iii) Speed is a scalar ...
Given, t = 10 min = 10 x 60 = 600 s Initial speed of train is given as u = 0 m/s Final speed of train as v = 40 k/h = = 11.1 m/s Now accele...
Correct answer: (c) magnitude of is equal to magnitude of displacement Explanation: When an object moves in a straight line in the fixed directio...
Correct answer: (A) object travel in Straight line Explanation: The magnitude of the average velocity of an object is equal to its average speed, ...
Prokaryotic Cells: 1. They are unicellular organisms, size ranges from 0.2μm – 2.0 μm in diameter. 2. The cell wall is present but chemically comp...
Hypertonic solution is the one which has higher osmotic concentration and less solvent concentration as compared to another solution. Isotonic solu...
(a) The symbol equation for the reaction is: H2 + N2 ➝ NH3 The balancing of equation is done in the following steps: Step I: Let us count the nu...
A chemical equation is said to be balanced if: (a) the atoms of different elements on both sides of the equations are equal. (b) the equation is m...
(a) Hydrogen gas and iron chloride are produced.
(d) displacement reaction
The balanced chemical equation is: 2Mg(s) + O2(g) ➝ 2MgO(s) Yes, magnesium (Mg) gets oxidised to form magnesium oxide (MgO) in this reaction is sa...
(a) In this reaction, sodium (Na) is oxidised to sodium oxide (Na2O). This means that oxygen (O2) gets reduced. (b) In this reaction, hydrogen (H2) ...
BaCl2(aq) + CuSO4(aq) → BaSO4(s) + CuCl2(aq)
Iron nail acquires a brown coating of copper as a result of displacement reaction. The solution becomes light green. Fe(s) + CuSO4(aq) → FeSO4(aq) +...
(a) The precipitate is yellow in colour. The compound is lead(II) iodide with chemical formula PbI2. (b) Pb(NO3)2(aq) + 2KI(aq) ➝ Pbl2(s) + 2KNO3(aq...
It is so because in water, the hydrogen is two times more than oxygen by mass and volume. The equation is expressed as: 2H2O(aq) + Electrolysis →...
(a) The substance ‘X’ is calcium oxide (also called quick lime). Its formula is CaO. (b) CaO(s) + H2O(l) → Ca(OH)2(aq)