Chemistry-day-13 periodic-table-mcqs Target ssc cgl 2018

Chemistry-day-13 periodic-table-mcqs Target ssc cgl 2018

Q1. How many elements are there in periodic table?

(a)112

(b)113

(c)114

(d)116

Q2. Who made periodic table by atomic number?

(a)Dmitri Mendeleev

(b)Dobereiner

(c)Alexander Mendeleev

(d)James Mendeleev

Q3. What is the element that is in the highest percentage in the composition of the earth?

(a)Silicon

(b)Oxygen

(c)Magnesium

(d)iron

Q4. How many vertical columns or ‘groups’ are there in periodic table?

(a)8

(b)18

(c)28

(d)38

Q5. How many horizontal rows or ‘periods’ are there in periodic table?

(a)5

(b)6

(c)7

(d)8

(a)acidic in nature

(b)basic in nature

(c)salts

(d)None of the above

Q7. Oxides of non-metals are.

(a)acidic in nature

(b)basic in nature

(c)salts

(d)None of the above

Q8. Metallic character ……..across the periods

(a)increases

(b)decreases

(c)remains same

(d)changes randomly

Q9. Metallic character ……..down a groups

(a)increases

(b)decreases

(c)remains same

(d)changes randomly

Q10. Silicon is a

(a)metal

(b)non-metal

(c)metalloid

(d)inert element

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