उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

Which technique is used to separate the different coloured dyes in an ink?

1. AMagnetism
2. BDistillation of the ink
3. CChromatography
4. DFiltration

Which state of matter has a fixed volume but takes the shape of its container?

1. ASolid
2. BGas
3. CLiquid
4. DPlasma

Which gas is needed for a fuel to burn (combustion)?

1. ACarbon dioxide
2. BOxygen
3. CNitrogen
4. DHelium

How does evaporation differ from boiling?

1. AEvaporation happens only at the surface and at any temperature; boiling happens throughout the liquid at a set temperature
2. BEvaporation needs a higher temperature than boiling
3. CEvaporation happens throughout the liquid at a set temperature; boiling happens only at the surface
4. DEvaporation produces a solid, while boiling produces a gas

0.5 mol of KCl is dissolved to make 250 mL of solution. What is its molarity?

1. A125 M
2. B2 M
3. C0.125 M
4. D0.5 M

कौन-सा कथन प्रबल अम्ल का वर्णन करता है?

1. Aउसका pH 7 से अधिक होता है
2. Bवह पानी में पूर्णतः आयनित हो जाता है
3. Cवह हमेशा अत्यधिक सांद्र होता है
4. Dवह हाइड्रोजन आयनों को केवल आंशिक रूप से छोड़ता है

Starch and cellulose are both made entirely of glucose units, yet humans can digest starch but not cellulose. Why?

1. ACellulose dissolves in water, so it is lost from the gut
2. BThe glucose units are linked differently, and humans lack an enzyme to break cellulose's links
3. CStarch contains nitrogen, which makes it easier to digest
4. DCellulose is really made of amino acids, not glucose, so stomach acid cannot break it

At room temperature chlorine (Cl₂) is a gas, bromine (Br₂) is a liquid and iodine (I₂) is a solid. What best explains this trend?

1. ALarger molecules with more electrons have stronger dispersion forces
2. BIodine forms hydrogen bonds but chlorine does not
3. CThe covalent bond in I₂ is much stronger than in Cl₂
4. DChlorine is ionic, while iodine is metallic