General Science Class 10

Which salts are excessively dissolved to make temporary hard water?

1. CaSO4 and CaCl2
2. KNO3 and KOH
3. CaCO3 and Ca(OH)2
4. Ca(HCO3)2 and Mg(HCO3)2

Water is a :

1. Polar solvent
2. Non-polar solvent
3. Amphiphatic solvent
4. Non-polar charged solvent

The taste of water is :

1. Sour
2. Bitter
3. Sweet
4. Tasteless

Which of the following is helpful for removal of permanent hardness?

1. Na2CO3
2. Ca(OH)2
3. CaCO2
4. Na2SO4

The Analytical Chemistry deals with instruments and methods to ______ identify and quantify the matter.

1. Mix
2. Separate
3. Differentiate
4. Manipulate

The sample may be solid, liquid, gas or a _______ in qualitative analysis.

1. Mixture
2. Compound
3. Differentiate
4. Substance

Analysis deals with the identification of presence of functional groups in compounds is :

1. Physical qualitative analysis
2. Analytical qualitative analysis
3. Organic qualitative analysis
4. Inorganic qualitative analysis

Flame test of Copper Halide with bluish-green color identify the presence of :

1. Halogen
2. Hydrogen
3. Copper
4. B and C

The physical methods used to measure physical properties is called?

1. Combustion analysis method
2. Volumetric analysis method
3. Atomic emission spectroscopy method
4. Gravimetric analysis method

The error caused by improper functioning of instrument is :

1. Determinant Error
2. Systematic Error
3. Indeterminant
4. A and B