Test 2
Name | Roll No |
SECTION – A ( 12 Marks) | ||||||||||||
Q.1 | Encircle the correct option i.e. A/B/C/D. All parts carry equal marks. (12) | |||||||||||
i. | What is the mass of 4 moles of hydrogen gas? | |||||||||||
A. | 8.064 g | B. | 4.032 g | C. | 1 g | D. | 1.008 g | |||||
ii. | If one mole of carbon contains x atoms, what is the no. Of atoms contained in 12g of Mg? | |||||||||||
A. | x | B. | O.5 x | C. | 2 x | D. | 1.5 x | |||||
iii. | A metal having A = 27 & Z = 13, how many no. Of neutrons are there? | |||||||||||
A. | 13 | B. | 14 | C. | 27 | D. | 15 | |||||
iv. | Which of the following is not correct about isotopes? | |||||||||||
A. | Same A | B. | Same p | C. | Same chemical properties | D. | Save physical properties | |||||
v. | Period no. Of Al is (Z = 13 & A = 27). | |||||||||||
A. | 1 | B. | 2 | C. | 3 | D. | 4 | |||||
vi. | Which of the following obey duplet rule? | |||||||||||
A. | Oxygen | B. | Flourine | C. | Hydrogen | D. | Nitrogen | |||||
vii. | Identify covalent compound. | |||||||||||
A. | NaCl | B. | MgO | C. | Water | D. | KF | |||||
viii. | A liquid boils when it’s vapour pressure becomes equal to…. | |||||||||||
A. | 760 cmHg | B. | 1 Pa | C. | 101.325 KPa | D. | 0.1 atm | |||||
ix. | In which of the following processes speed of the particles decreases? | |||||||||||
A. | Melting | B. | Boiling | C. | Sublimation | D. | Condensation | |||||
x. | Which of the following solutions is more dilute? | |||||||||||
A. | 1 M | B. | 2 M | C. | 0.1 M | D. | 0.009 M | |||||
xi. | Galvanizing is coating with…. | |||||||||||
A. | Sn | B. | Cr | C. | Zn | D. | Cu | |||||
xii. | Which of the following is the strongest acid? | |||||||||||
A. | HI | B. | HF | C. | HCl | D. | HBr |
SECTION – B (33 Marks) | ||||
Q.2 | Attempt any 11 of the following short questions. All parts carry equal marks. | (3 x 11 = 33) | ||
What do you know about corpuscular nature of matter? | ||||
Differentiate between shells and subshells. | ||||
Explain Shielding Effect. | ||||
Draw dot cross structure of MgO. (Mg = 12 & O = 8). | ||||
Differentiate between Boyle’s & Charles’ Law. | ||||
A sample of Ne that is used in Ne-Signs has a volume of 1500 cm3 at a pressure of 636 torr. The volume of the gas after it is pumped into the glass tube of the sign is 1213.74 cm3, when it shows a pressure of 786 torr. Show that the data obeys Boyle’s Law. | ||||
Gasoline does not dissolve in water. Why? | ||||
Differentiate between oxidation & reduction? | ||||
Explain chromium plating. | ||||
Differentiate between amorphous & Crystalline solids. | ||||
Enlist characteristics of metal. | ||||
Give importance of Ag. | ||||
Calculate mass in grams of 9.05 moles of O3. (O = 16) |
SECTION – C (20 Marks) | ||||
Q.3 | Attempt any 2 of the following long question. | (10 x 2 = 20) | ||
i. | Calculate no. Of atoms in 3.4 moles of Nitrogen. (5) | |||
ii. | Explain Bohr’s Atomic model. (5) | |||
Q.4 | i. | Differentiate between covalent & Ionic bond. (5) | ||
Ii. | Calculate no. Of moles of solute present in 1.25 cm3 of 0.5 M H3PO4 solution? (5) | |||
Q.5 | i. | Calculate oxidation state of Cr in K2Cr2O7. (5) | ||
Ii. | Prepare 0.2 M solution of KMnO4. (5) | |||