Tag: occurrence of metals and non metals

Questions Related to occurrence of metals and non metals

Non-metal used in packing of potato chips in:

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. Carbon.

  2. nitrogen.

  3. oxygen

  4. Chlorine.

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Correct Option: B
Explanation:

Potato chip bags are not full of air, but of nitrogen gas. This is done to prevent the chips from oxidizing, which is part of what makes them go stale. Oxygen is very reactive, and likes to combine with other molecules whenever it can, causing chemical changes to take place.

A purpled coloured non-metal forms a brown solution in alcohol which is applied on wounds as antiseptic . Which non metal is this?

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. Sulphur

  2. Chlorine

  3. Oxygen

  4. Iodine

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Correct Option: D
Explanation:

A purple coloured non-metal which forms a brown solution in alcohol, which is applied on wounds as an antiseptic is iodine. It is also known as tincture iodine. It is basically a weak solution of iodine with only 2 to 7 % iodine dissolved in asolution of water and ethanol along with potassium or sodium iodide.

In metal reactivity series the more reactive metals are at 

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. top

  2. bottom

  3. middle

  4. none

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Correct Option: A

Out of the alloys given below which one contains a non-metal?

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. Brass

  2. Bronze

  3. Stainless steel

  4. Solder

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Correct Option: B

When Amrita was asked to pick up a few articles from a collection, she picked up the following:
Wooden scale, glass test tube, paper basket.


Which article is she most likely to pick up next?

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. Steel cup

  2. Iron chain

  3. Rubber gloves

  4. Copper wire

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Correct Option: C
Explanation:

Wooden scale, glass test tube, paper basket are all non-metals and a poor conductor of electricity and Rubber gloves are similar to these. Also if she is doing any lab work as Wooden scale, glass test tube, paper basket are usually composed of carrying out some experiment then she would need a rubber glove.

Hence, option C is correct.

In the native state, gold is present :

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. as a mixture with a metal

  2. in free state

  3. as a mixture with a non metal

  4. as a mixture with a compound

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Correct Option: B
Explanation:

Very few metals exist in the free or native state. Only metals like gold, platinum and mercury are occasionally found in the free state, i.e., in the pure form.

The most abundant element in the universe is:

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. helium

  2. oxygen

  3. silicon

  4. hydrogen

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Correct Option: D
Explanation:

Hydrogen is more plentiful than any other element making up about 3/4th the mass of the universe. Helium is second making up almost all of the remaining $25\%$. Oxygen is third most abundant element of universe. On earth, oxygen is the most common element making up about $47\%$ of earth's mass.

The metallic element present in chlorophyll is:

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. $Hg$

  2. $Fe$

  3. $Mg$

  4. $Ni$

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Correct Option: C
Explanation:

1) Chlorophyll contains a magnesium ion, encased in a large ring structure known as a chlorine.

 2) The chlorine ring is a heterocyclic compound derived from pyrrole. 

3) Four Nitrogen atoms from the chlorine surround and bind the magnesium atom.

Calcium occurs as a/an___________.
(a) oxide ore (b) halide ore (c) carbonate ore (d) sulphide ore

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. a, b

  2. b, c

  3. a, d

  4. c, d

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Correct Option: B
Explanation:

Calcium occurs as carbonate in limestone $(CaCO _{3})$ and as flouride in flourspar $(CaF _{2})$.

Halide ores are seen for:

chemistry non-metals introduction to non-metals occurence of metals occurrence of metals and non metals

  1. sodium

  2. calcium

  3. both $A$ and $B$

  4. none of the above

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Correct Option: C
Explanation:

Sodium occurs as chloride in rock salt, $(NaCl)$ and calcium occurs as fluoride in flourspar $(CaF _{2})$.