- Chemical Process
- Hydrogen Reaction
- Nitrogen Reaction
- None of these
- A
Chemistry MCQs
All Chemistry MCQs are included in this section of ETEST Academy’s Website. All Chemistry MCQs are completely solved with detailed answers. All Chemistry MCQs are taken from different Current & Past Papers. Our team updates ETEST Website on daily basis.
Anything that has mass and occupy space is called:
- Matter
- Substance
- Element
- None of these
- A
-
There are three states of matter
Solid
Liquid
Gas
سرخ رنگ کو جب نیلے رنگ سے ملایا جاتا ہے تو کونسا رنگ بنتا ہے ؟
- سبز
- سرمئی
- گلابی
- جامنی
- D
-
بنیادی رنگوں کی تعداد تین ہے جن میں سرخ، نیلا اور سبز شامل ہیں۔
What is symbol of Potassium?
- K
- Na
- Pb
- Hg
- A
-
Na is symbol of Sodium
Pb is symbol of Lead.
Hg is symbol of Mercury.
لیموں میں کونسا تیزاب پایا جاتا ہے؟
- ہائیڈروکلورک ایسڈ
- سلفیورک ایسڈ
- سٹرک ایسڈ
- اوپر والے تمام
- C
-
تمام تُرش پھلوں اور سبزیوں میں سِٹرک ایسڈ موجود ہوتا ہے۔
سمندری پانی میں زیادہ پایا جانے والا نمک کونسا ہوتا ہے؟
- MgCl2
- MgSO4
- CaSO4
- NaCl
- D
-
سمندر کے کُل پانی کے 3.5 فیصد میں سوڈیم کلورائیڈ شامل ہوتا ہے۔
عام اصطلاح میں سوڈیم کلورائیڈ کو کھانے والی نمک کہا جاتا ہے
Who discovered the Hydrochloric Acid?
- Jabir Bin Hayyan
- Al-Razi
- Al-Khawarzmi
- None of these
- A
-
Hydrochloric Acid is also known as Muriatic Acid.
Jibir Bin Hayyan discovered Hydrochloric Acid in 800 AD.
Chemical Formula of Hydrochloric Acid is HCl.
Sulfuric Acid also discovered by Jibir Bin Hayyan.
Chemical Formula of Sulfuric Acid is H2SO4.
Which of the following involve in bread and vinegar formation?
- Viruses
- Algac
- Fungi
- Microbes
- D
-
The bacteria Acetobacter Aceti is evolved in formation of Vinegar and Bread.
This bacteria has ability to convert Ethanol to Acetic Acid.
This bacteria was discovered in 1864.
This is also used in formation of wine and beer.
All those reactions which take place in heat energy are known as:
- Exothermic reactions
- Combustion reactions
- Endothermic reactions
- Incineration reaction
- A
-
Exothermic is a chemical reaction that release energy in form of light and heat.
Burning or Candles, Rusting of Iron, Reaction of Water and Acid, Making of Ice cube, Burning of Sugar are examples of Exothermic Reaction.
When acid and alkali are mixed, they produce salt this process is known as:
- Acidification
- Neutralization
- Ammonification
- Nitrification
- B