Bihar PGT Chemistry Mock Test - 8 - Bihar PGT/TGT/PRT MCQ

The correct option is Option 1, i.e., ‘deposited into’.
The correct tense of the bracketed phrase has to be used for the sentence to make proper sense. Therefore, ‘deposit into’ has to be replaced by ‘deposited into’, making Option 1 the correct choice

'Back to square one' means to come back to the point where something was initially started.  Option 3 is thus absolutely correct.
Example- After the failure of the machine prototype, the team was back to square one.

The correct answer is Option 2. The correct spelling is ‘convenience’. 

मलिक मुहम्मद जायसी हिन्दी साहित्य के भक्ति काल की निर्गुण प्रेमाश्रयी धारा के कवि थे। वे अत्यंत उच्चकोटि के सरल और उदार सूफ़ी महात्मा थे। जायसी मलिक वंश के थे। उनकी प्रमुख कृतियों में पद्मावत, अखरावट, आख़िरी कलाम, कहरनामा, चित्ररेखा आदि प्रमुख हैं।

संस्कृत सहित्य में प्रत्येक कवियों को उनकी रचनाओं में पाये जाने वाली विशेषताओं के अनुसार कुछ पङ्क्तियों में गुणगान किया गया है-

विद्वानों में मान्यता है कि दण्डी कृत् ‘दशकुमारचरित’ आदि काव्यों में नित्य नूतन शब्दों का प्रयोग हुआ है इसलिए 'दण्डिनः पदलालित्यं' कहा जाता है।

अतः स्पष्ट है कि 'पदलालित्य' के विषय में महाकवि दण्डी प्रसिद्ध है।

यह संवाद चन्द्रगुप्त नाटक में चाणक्य के द्वारा कहा गया है। 

नाटक कार - जयशंकर प्रसाद 
प्रकाशन वर्ष - 1931
प्रमुख पात्र - चन्द्रगुप्त, चाणक्य, शकटार, आंभीक, सेल्यूकस, कार्नेलिया, कल्याणी, मालविका आदि 

"यह कथा ज्योति की है, अंधों के लिए" कथन "धर्मवीर भारती" जी की है।

यह कथन अँधा युग की भूमिका में है। अंधा युग एक गीतिनाट्य है। इसका प्रकाशन वर्ष 1954 ईस्वी है। यह महाभारत के बाद की कथा है। धर्मवीर भारती जी को 1972 में पद्मश्री से सम्मानित किया गया था।

‘उच्चारण’ का संधि विच्छेद करने पर ‘उत्+चारण’ होगा तथा यहाँ व्यंजन संधि है।

व्यंजन संधि में यदि त् + च या छ आये तो त् का च् हो जाएगा। जैसे– उत् + चारण = उच्चारण, महत् + छत्र = महच्छत्र।

स्वर संधि-स्वर वर्ण के साथ स्वर वर्ण के मेल से विकार उत्पन्न होता है, जैसे– विद्या + अर्थी = विद्यार्थी, महा + ईश = महेश।

व्यंजन संधि-एक व्यंजन से दूसरे व्यंजन या स्वर के मेल से विकार उत्पन्न होता है, जैसे - अहम् + कार = अहंकार, उत् + लास = उल्लास।

विसर्ग संधि-विसर्ग के साथ स्वर या व्यंजन के मेल से विकार उत्पन्न होता है, जैसे– दुः + आत्मा =दुरात्मा, निः + कपट =निष्कपट।

Concept:

• The rotation of the earth on its axis causes day and night. 
• Whereas change in season happens due to revolution of the earth and the tilt of the axis of the earth
• Earth is tilted at an angle of 23.5
• If the earth was not tilted at all, all regions would have received the same amount of sunlight all through the year and there would have been no change in seas.
• Because of the tilt of the earth's axis, the amount of sunlight that falls on the earth's surface decreases from the equator towards the poles.
• The sun falls directly at the equator, while the poles are tilted farthest from the sun.

Explanation: 

• The Equator is the central latitude of the earth.
• Sun rays fall directly at the equator throughout the year hence it remains warm throughout the year without much change in the seasons.
  

⇒ The equatorial zone has the least seasonal variation on earth

The correct answer is Thymine and Cytosine.

Key Points

• The pyrimidines in DNA are C & T. In RNA, U replaces T.

• Cytosine (C) formula is C₄H₅N₃O and Thymine (T) formula is C₅H₆N₂O₂.

Additional Information

• Deoxyribonucleic acid, commonly known as DNA, is the hereditary complex molecule present in humans and almost all other organisms.
• The information in DNA (double helix structure) is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T).
  • DNA has two base pairs, A-T and G-C, attached to a sugar-phosphate backbone.
• DNA is a long molecule that contains our unique genetic code.
  • It holds the instructions for making all the proteins in our bodies and the function of living things.
• In the cell nucleus, the DNA (deoxyribonucleic acid) molecule is packaged into thread-like structures called chromosomes.
  • A chromosome (microscopic structure) is made up of DNA tightly coiled many times around proteins called histones that support its structure.
  • A chromosome has two arms - a p arm (short arm) and a q arm (long arm), joined in the location of the centromere.

Important Points

• Watson and Crick Proposed the Double Helix structure of DNA with the two strands connected by hydrogen bonds.

Q, R, S, T, U, and V are seated in a straight line facing North.

i) S is second to the right of T.

ii) T is second to the right of Q.

iii) R is to the immediate left of Q

iv) R is to the immediate left of Q and is second to the left of V.

Thus we can see Q is sitting Fourth to the left of S.

Hence, the correct answer is "Option 4".

Reducing power of Zn increases as :
alcohol < H₂O < H₂O / H⁺

Ni²⁺ and Ti³⁺ ions are coloured in aqueous solution because they contain unpaired electrons.

Covalent solid doesnot conduct electricity in molten and solid state.

O — H group is attached to (ene) is m ost a cidic and thus, has maximum intermolecular H-bonding.

The correct answer is option  D.
Milk is an emulsion with fat particles (globules) dispersed in an aqueous (watery) environment. The fat globules do not coalesce and form a separate layer (oil off or churn) because they are protected by a membrane layer which keeps the fat particles separate from the water phase.

Fluorine has highest electronegativity among all known elements, so it shows only negative oxidation states.

Option ‘a’ represents metallic character of Mg. All others remaining represent nonmetals and metalloids.

Molar mass = 6(12) + 10(1) + 5(16) = 162g

= 2.53/106   2.59 × 10^-2  5.9 × 10^-2
0.238 × 0.25          = 1.18 × 10^-3

250 ml - 0.238

= 0.955

0.955  0.955 

[Co(CO)₄]
EAN = 27 –(0)+ 4 × 2 = 35
2[Co(CO)₄] → Co₂(CO)₈

EAN = 27 + 1 + 4 ×2 = 36

Among alkali metals, melting point decreases as the strength of metallic bonding decreases with increasing size of the atom. Thus, Cs has the lowest melting point (28.5°C) and will melt at 30°C.

NaHCO₃ + H₂SO₄ →  Na₂SO₄ + H₂O + CO₂
extingusher fire

0.4m of KMnO₄ = 1 mole of SO₂
​= 1 mole of SO₃ 
2SO₂ + O₂ ⇌ 2SO₃
2      1         0
1      0.5       1
K = [SO₃]²/[SO₂]² [O₂]
= 12/(1²*0.5)
= 2

Ozone is detected by using Hg.

This is double salt so name is written in sequential manner.

Both XeF₂ & CO₂ have linear structures. Both are actually linear Tri-atomic molecules.