SSC CGL 2019 Chemistry Question Paper PDF

SSC CGL 2019 [3 March-09 March 2020] Chemistry: – 29 Questions

Q.1: – What is the more common name for solid carbon dioxide?
ठोस कार्बन डाइऑक्साइड का अधिक सामान्य नाम क्या है? [03 March CGL 2020 Mor Shift] 1. Epsom / एप्सम
2. Dry Ice / सूखी बर्फ
3. Potash / पोटाश
4. Quick Silver / क्विक सिल्वर (पारद)
Correct Answer:- Dry Ice / सूखी बर्फ
Comment :- The common name is dry ice. Dry ice is the solid form of carbon dioxide. It is used primarily as a cooling agent.

Q.2:- When we cut an onion, the synthase enzyme converts the amino acid sulfoxides of the onion into which acid?
जब हम एक प्याज काटते हैं, तो सिंथेज एंजाइम प्याज के अमीनो एसिड सल्फोऑक्साइड को किस अम्ल में परिवर्तित करता है? [03 March CGL 2020 Noon Shift] 1. Sulfenic acid / सल्फेनिक एसिड
2. Citric acid / साइट्रिक एसिड
3. Nitric acid / नाइट्रिक एसिड
4. Sulphuric acid / सल्फ्यूरिक एसिड
Correct Answer:- Sulfenic acid / सल्फेनिक एसिड
Comment:- Lachrymatory-factor synthase is released into the air when we cut an onion. The synthase enzyme converts the amino acids sulfoxides of the onion into sulfenic acid.

Q.3:- Which of the following is the major component of vinegar?
सिरका निम्नलिखित में से कौन सा प्रमुख घटक है? [03 March CGL 2020 Noon Shift] 1. Citric acid / साइट्रिक एसिड
2. Lactic acid / लैक्टिक एसि
3. Nitric acid / नाइट्रिक एसिड
4. Acetic acid / एसिटिक एसिड
Correct Answer:- Acetic acid / एसिटिक अम्ल
Comment:- Vinegar is a liquid that is produced from the fermentation of ethanol into acetic acid. The fermentation is carried out by bacteria. Vinegar consists of acetic acid (CH3COOH), water and trace amounts of other chemicals.

Q.4:- The process of coating grooves or engravings in ornaments with coloured enamels is called ________.
रंगीन एनामेल्स को गहनों में खांचे या उत्कीर्णन की प्रक्रिया को ________ कहा जाता है।
[03 March CGL 2020 Eve. Shift] 1. Phulkari / फुलकारी
2. Zardozi / जरदोजी
3. Chikankari / चिकनकरी
4. Meenakari / मीनाकारी
Correct Answer:- Meenakari / मीनाकारी
Comment:- Meenakari is the covering of a metal object with colored enamels. Red, Green and White enamels dominate in this art. The metal used is called ‘chitras’. In this process, grooves or engravings in ornaments are coated with colored enamels.

Q.5:- Calcium sulphate dihydrate is commonly known as ________.
कैल्शियम सल्फेट डाइहाइड्रेट को आमतौर पर ________ के रूप में जाना जाता है।
[03 March CGL 2020 Eve. Shift] 1. gypsum / जिप्सम
2. glass / कांच
3. asbestos / अभ्रक
4. limestone / चूना पत्थर
Correct Answer:- gypsum / जिप्सम
Comment:- Calcium sulfate, CaSO4, is a naturally occurring calcium salt. It is commonly known in its dihydrate form, CaSO4∙2H2O, a white or colourless powder called gypsum.

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