Question

CHEMISTRY
When 0.1 g of hydrogen is burnt in oxygen, the number of water molecules produced is
equal to
(a) 6.02 x 1023 (b) 3,01 x 1023 (c) 3,01 x 10 (d) 6.02 x 1022
How many moles of electrons weigh one kilogram?
1
6.023
(a) 6.02 x 10
(b)
-x103
9.108
9.108
132
33-
-x10%
1
(d)
-*10*
9.108x6.023
3.
Number of atom in 558.5 g Fe (At. wt. of Fe = 55.85 g mol-'), is
(a) twice that in 60 g carbon (b) 6.023 x 1022
(C) half that in 8 g He
(d) 558.5 x 6.023 x 1023
16 34 -
0.56 g of a gas occupies 80 cm' at NTP, then its molecular mass is
(a) 4.8 (b) 44.8 © 2
(d) 22.4
5.
The maximum number of molecules will be present in
(a) 16 g of NO, gas (b) 16 g of O, gas (©) 7 g of N, gas (d) 2 g of H, gas
Which has maximum number of atoms?
(a) 24 g C(12) (6) 56 g of Fe (56) (c) 27 g of AI (27) (d) 108 g of Ag (108)
6.
7.
Which of the following statements is dependent on temperature ?
(a) Molality (b) Molarity (C) Mole fraction (d) Weight percentage
35
36-
31
38
39
yo
Which of the following constitute 0.1 g mole?
(a) 6.023 x 1022 molecules of benzene (b) 0.14 g of N, gas
C) 2.24 litres of Co, at STP. (d) 0.40 g of He gas
Which of the following are elements ?
(a) Diamond (b) Graphite (c) Fools gold (d)A&B
9.
10.
Which of the following are mixtures ?
(a) Gasoline (b) Steel (c) Sodium (d)A&B
Which of the following is/are mixture ?
(a) lodised salt (b) Steam (c) Rb (d) Fr​

Answer 1

Answer:

that's tooo long too ans.....ask these questions in bits and pieces......

Answer 2

lun pay charo bsdk walay kia hai sala answer to ata hi nai