Hello ! Welcome to your NTSE SAT - Chemistry Instructions: Time: 10 min Full Marks: 60 There is negative marking of -1 for all incorrect answers of MCQs. There is no deduction for NOT attempted question. All questions carry equal marks and all 15 questions are of 4 marks each. (Powered By: Kailasha Foundation - Fun & Learn Portal) Note: This mock looks best on a desktop. Name Email 1. Earth moves around the sun and hence causes seasons to change from summer to winter to monsoon is Chemical Change Physical Change Periodical Change Irreversible Change2. Match the following and choose the answer from the code given below: (A)Metals on heating (i) Reversible change (B)Souring of milk (ii) Expand (C) Making clay toys (iii) Periodic change (D) Rising sun (iv) Irreversible change (A)-(ii), (B)-(i), (C)-(iv), (D)-(iii) (A)-(ii), (B)-(iv), (C)-(i), (D)-(iii) (A)-(iiI), (B)-(iv), (C)-(i), (D)-(ii) (A)-(ii), (B)-(iv), (C)-(iii), (D)-(i) 3. Select the irreversible changes from the following and choose the answer from the options given below. (i) Melting of wax (ii) Freezing of water (iii) Formation of curd from milk (iv) Conversion of dough into bread (i) & (ii) (i), (ii) & (iv) (iii) & (iv) All the above4. When you added a certain liquid to methyl orange, methyl orange solution changes to red, the liquid can be Soap Solution Lemon Juice Milk of Magnesia Water5. A base which dissolves in water is called: Soluble base Alkali Hydroxides Hydrides6. The sewage digested by the bacteria undergoes Chemical Change Physical Change Reversible Change Periodic Change7. The nature of industrial waste is generally Acidic Basic Neutral Both 1 and 28. Pick out physical changes from the following: (i) Rusting of iron (ii) Dissolving salt in water (iii) Boiling dissolved sugar in water (iv) Bursting of motor-cycle tube (i) & (ii) (iii) & (iv) (ii) & (iv) (i), (ii) & (iii)9. The main cause of smog is due to PAN Carbon Di Oxide and Sulphur Di Oxide Carbon Mono Oxide and Sulphur Di Oxide Sulphur Di Oxide and Ammonia10. The acidic soil in farm usually treated by Ammonium Hydroxide Calcium Oxide Sodium Hydroxide Magnesium Hydroxide11. Acid present in tamarind is Lactic Acid Acetic Acid Formic Acid Tartaric Acid12. Concentrated orange juice is added to a solution and the solution turns green Litmus Turmeric Powder Vanila Essence China Rose13. For the formation of Sugar syrup for sweets, steps are (a) Dissolving the sugar in Water (b) Heating the sugar solution Choose the correct statement. Process A is a chemical change Process B is a chemical change Both processed A and B are chemical changes None of these processes is a chemical change.14. When you add Glucose into water, the glass gets cooled, this is an example of Endothermic Reaction Exothermic Reaction Displacement Reaction Combustion15. An oxidation reaction involves: Addition of hydrogen or removal of oxygen Addition of Oxygen only Addition of Oxygen or removal of hydrogen Addition of hydrogen OnlyYou can always contact system administrator here for any kind of technical glitches. 2Ankit Keshan, Utkarsh Gupta likes this.