Which one has the lowest density at room temperature ?

Related Mcqs:

1. Which state of matter has the lowest density ?

   A. Gas
   B. Liquid
   C. Solid
   D. Plasma

2. CO2 is gas while SiO2 is solid at room temperature?

   A. carbon is non-metal while silicon is semi-metal
   B. CO2 is an independent molecule while SiO2 has network covalent structure
   C. CO2 forms multiple bond while silicon does not form multiple bonds
   D. Silicon has all sigma bonds

3. At constant temperature the pressure of an ideal gas is doubled its density becomes_______________?

   A. Half
   B. Double
   C. Same
   D. None

4. What is the density ofargon gas at a temperature of 30°C and a pressure of 1.05 atm?

   A. 1.65 g/L
   B. 1.67 g/L
   C. 1.68 g/L
   D. None of the above

   Submitted by: Muhammad Ali Kunbhar

5. Which of the following has lowest lattice energy?

   A. LiF
   B. NaCl
   C. KBr
   D. CsI

   Submitted by: Abdul Basit Lashari

6. If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at________________?

   A. 0?C
   B. 273.16K
   C. ?273.16 K
   D. ?273.16?C

7. Water has maximum density at __________________?

   A. 0°C
   B. 2°C
   C. 4°C
   D. 100°C

8. When water freezes at 0°C its density decreases due to_______________?

   A. Change of bond angles
   B. Cubic structure of ice
   C. Empty space present in the structure of ice
   D. Change of bond length

9. Density of H2SO4 in lead accumulator is__________________?

   A. 1.25g/cm3
   B. 1.3g/cm3
   C. 1.20g/cm3
   D. 1.15g/cm3

10. A gas was found to have a density of 0.0847g/L at 17°C and a pressure of 760 torr. The gas must be?

    A. CH4
    B. He
    C. N2
    D. None of These

    Submitted by: Abdul