Modern Periodic Table

Q.

Study the periodic table and describe its important features.

Q.

In its properties hydrogen resemble

1. Alkali metal only

2. Halogen only

3. Neither alkali nor halogen

4. Alkali metal as well as halogen

Q.

Which of the following is not a non-metal?

1. Hydrogen

2. Carbon

3. Nitrogen

4. Sodium

Q. Which of the following electronic configuration is incorrect?

1. P = $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^1$
2. Q = $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^1$
3. R = $1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}3d^5$
4. S = $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^6$

Q.

Give reason for the following:

Hydrogen forms a positive ion just like metals. Still, it combines with very reactive metals

Q.

Is rubidium man-made or natural?

Q. Which element in the modern periodic table is similar to eka-silicon?

1. Phosphorus
2. Carbon
3. Germanium
4. Aluminium

Q. The chemical symbols of the mercury and potassium based on their latin names are ____ and _____ respectively.

1. Hg, K
2. Me, K
3. Me, Po
4. Hg, Po

Q.

How many periods and groups are there in the Modern Periodic Table?

Q. All minerals are ores but not all ores are minerals.

1. True
2. False

Q.

According to Mosley, a straight line graph is obtained on plotting

1. The square root of the frequencies of the characteristic X-rays of elements against their atomic numbers.

2. The reciprocal of the frequencies or characteristic X-rays of elements against their atomic numbers.

3. The frequencies of characteristic X-rays of the elements against their atomic numbers.

4. The square of the frequencies of the characteristic X-rays of elements against their atomic numbers

Q. The chemical properties and atomic masses of oxygen and carbon are different. This can be explained using the postulates of:

1. Dalton's atomic theory
2. Avogadro's law
3. law of conservation of mass
4. law of constant proportion

Q. Which of the following does not represents a polyatomic ion?

1. Chloride
2. Sulphite
3. Phosphate
4. Sulphate

Q.

What is the basis of long form of periodic table?

1. Atomic mass

2. Metallic & non-metallic character

3. Atomic number

4. Atomic size

Q.

Which of the following is/are metalloid?

1. Silicon

2. Aluminium

3. Both aluminium and silicon

4. Sulphur

Q.

What is a method to indicate reactants and products of a chemical reaction using chemical formulae?

1. Chemical balance

2. Chemical equilibria

3. Periodic table

4. Chemical equation

Q. The incorrect statement about deuterium is :

1. it contains $\left[\right(1e^{-})+(1p^{+})+(1\left(n\right)]$
2. it contains $\left[\right(1p^{+})+(1\left(n\right)]$
3. it is an isotope of hydrogen
4. $D_{2}O$ is called heavy water

Q. Which among the following is the chemical formula of sodium chloride?

1. NaCl
2. NaCL
3. Nacl
4. naCl

Q. Assertion :Mass spectrometer is used for the determination of isotopes. Reason: Isotopes are the atoms of same element differing in mass numbers.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect and Reason is correct

Q. Choose the correct memory cards based on the property by which the method of concentration of ores.

1. Density
2. Wettability
3. Froth floatation
4. Magnetic ability
5. Hydraulic washing
6. Magnetic separation