class 10 chemical reactions and equations mcq

Plants synthesise one of the following during photosynthesis. 1. Hydrogen 2. Chlorophyl 3. Water vapour 4. Starch

Formation of nitric oxide is an example for 1. endothermic reaction 2. exothermic reaction 3. both (1) and (2) 4. none of these

Formation of ammonia is an example of 1. endothermic reaction 2. exothermic reaction 3. both (1) and (2) 4. none of these

The bond energy required to break one mole of HCl is 1. 103 kcal 2. 104 kcal 3. 44 kcal 4. 300 kcal

An example for naturally occurring endothermic reaction is 1. respiration 2. electrolysis of water 3. photosynthesis 4. none of these

The energy required in breaking a mole of H-H bond is 1. 104 kcal 2.62 kcal 3.57.8 kcal 4. 10.3 kcal

Internal energy of a substance depends on 1. number of atoms present in a molecule 2. number of molecules present in a substance 3. chemical structure and physical state 4. none of these

Energy stored in the molecules is known as 1. Heat energy 2. Light energy 3. Internal energy 4. Kinetic energy

Energy is released in one of the following reactions. 1. Decomposition reactions 2. Endothermic reactions 3. Exothermic reactions 4. None of these

[{"selector":"#anim-20d28309-1ad8-41a5-8402-bd43681263f7","keyframes":{"transform":["translate3d(115.18987%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-0fa13c1b-124b-4360-b7c5-6a5d8c66e16e","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] [{"selector":"#anim-bf856536-516c-4186-b655-ca7115725c71","keyframes":{"transform":["scale(0.15)","scale(1)"]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"forwards"}]