SSC CGL 2018 (4 June to 13 June 2019)
Chemistry: – 38 Q’s
Q.1 Which of the following elements is a metalloid?
निम्नलिखित में से कौन सा तत्व एक मैटलॉयड है? (04 June 2019 Shift Mor)
Correct Answer:- Silicon सिलिकन
Comment:- A metalloid is an element that has properties that are intermediate between those of metals and nonmetals. Metalloids can also be called semimetals. On the periodic table, the elements colored yellow, which generally border the stair-step line, are considered to be metalloids.
The metalloids; boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), and polonium (Po) are the elements found along the step like line between metals and non-metals of the periodic table.
Q.2 Methyl propane is an isomer of:
मिथाइल प्रोपेन का एक आइसोमर है: (04 June 2019 Shift Mor)
1 . n-hexane
Correct Answer:- n-butane एन–ब्यूटेन
Comment:- Isobutane, also known as i-butane, 2-methylpropane or methylpropane, is a chemical compound with molecular formula HC(CH3)3. It is an isomer of butane.
Q.3 Which gas in its solid state is also known as dry ice?
ठोस अवस्था में कौन सी गैस को शुष्क बर्फ के रूप में भी जाना जाता है? (04 June 2019 Shift Mor)
2. Carbon dioxide
Correct Answer:- Carbon dioxide कार्बन डाइऑक्साइड
Comment:- Carbon dioxide in its solid state is called dry ice.
Q.4 The property of catenation is predominant in ________.
कैटेनेशन (श्रृंखलन) की गुण ________ में प्रमुख है। (04 June 2019 Shift Mor)
Correct Answer:- carbon कार्बन
Comment:- The catenation (catenation is the bonding of atoms of the same element into a series, called a chain.) property is predominant among carbon atoms, significant among sulfur and silicon atoms, and slightly present among germanium, nitrogen, selenium, and tellurium atoms.