Formatting page ...
HIRANANDANI FOUNDATION SCHOOL, THANE Second Preliminary Assessment, January 2023 Subject: Chemistry CLASS:X DATE:5/1/23 Time: 2 hours Max Marks: 80 sheet. Answers to this paper must be written on the separate answerthe answers. write to allotted time the The time given at the head of this paper is You will not be allowed to write during the first 15 minutes. This time is tobe spent in reading the question paper. This question paper consists of 06 printed pages. any four questions from Section B. Section A is compulsory. Atempt sub-question are given in the brackets J. or question each for The intended marks SECTION A (Atempt all questions from this Section) Question 1 Choose one correct answer to the questions from the given options: [15] the following takes place? i) During the electrolysis of acidified water, which of a) b) c) d) Oxygen is released at cathode Oxygen is released at anode Hydrogen is released at anode Sulphur dioxide is released at anode concentrated alkali gives salt and ii) Identify the hydroxide which on heating with a) Iron (III) hydroxide water. b) Calcium hydroxide c) Lead (U) hydroxide d) Potassium hydroxide 17,12 and 13 respectively. ii) The elements A, B, C, D and E have the atomic numbers 9,11, table is periodic the of group same to the belongs which The pair of elements t t s a) A and B b) Band D c) A and C d) D and E iv) Atomic masses of Silicon, Nitrogen and Hydrogen are 28,14 and 2 respectively. Which of the following statements regarding the number of atoms in 28g Silicon, 14g of Nitrogen and 2g of Hydrogen is correct? P: 14g of Nitrogen contains seven times the number of atomns as 2g of Hydrogen. Q: 14g of Nitrogen contains half the number of atoms as 28g of Silicon. a) Only P b) Only Q Both P and ) d) Neither P nor Q v) Ifthe PH of a solution is 2 then the solution is a) Strong acid b) Strong alkali c) Weak acid d) Weak alkali vi) The catalyst used in contact process is a) Platinum b) Finely divided Iron c) Vanadium pentoxide d) Graphite Page 1 of 6
|
