Bihar PGT Chemistry Mock Test - 6 - Bihar PGT/TGT/PRT MCQ

'Picturesque' means a view of something that is visually pleasing. Thus, it is the best replacement for the given phrase.
None of the other options exactly mean the given phrase.
Example- Scotland is famous for its picturesque landscape and structured architecture. 

उतर गयी लोई तो क्या करेगा कोई' पूर्ण लोकोक्ति होती है। इसका अर्थ है- इप्जत जाने पर डर किसका? इसके अन्य विकल्प असंगत हैं।

उपर्युक्त पंक्तियाँ मैथिलीशरण गुप्त द्वारा रचित "भारत भारती" से अवतरित है। इस काव्यकृति में स्वदेश -प्रेम को दर्शाते हुए वर्तमान और भावी दुर्दशा से उबरने के लिए समाधान खोजने का सफल प्रयोग किया है। दृक्क्कालिमा का तात्पर्य अति विस्तृत अंधकार(ऑँखों की कालिमा) है।

आदि का अर्थ है: आरंभ, शुरू। और इसका विलोम शब्द अंत है।

एक अच्छे निबंध में संक्षिप्तता, एकसूत्रता तथा पूर्णता जैसे गुण विद्यमान होते हैं। निबंध लेखक को पुनरुक्ति से बचना चाहिए तथा अपनी बात को तर्कपूर्ण ढंग से व्यक्त करना चाहिए। तर्कों की पुष्टि हेतु आंकड़े, उद्धरण आदि इस प्रकार से प्रस्तुत करने चाहिए जिससे वे विषय के साथ एकरस हो जाएं, पैबन्द जुड़े हुए प्रतीत न हों।

Federalism is a system of government in which the power is divided between a central authority and various constituent units of the country.

• Usually, a federation has two levels of government. One is the government for the entire country that is usually responsible for a few subjects of common national interest.
• The others are governments at the level of provinces or states that look after much of the day-to-day administering of their state.
• Both these levels of government enjoy their power independent of the other.

Important Points

Concurrent List includes subjects of common interest to both the Union Government as well as the State Governments, such as education, forest, trade unions, marriage, adoption and succession.

• Both the Union as well as the State Governments can make laws on the subjects mentioned in this list. If their laws conflict with each other, the law made by the Union Government will prevail.

Thus, on trade union subject both the Union as well as the State Governments can make laws.

Additional Information

• Union List includes subjects of national importance such as the defence of the country, foreign affairs, banking, communications and currency.
  • They are included in this list because we need a uniform policy on these matters throughout the country.
  • The Union Government alone can make laws relating to the subjects mentioned in the Union List. 
• State List contains subjects of State and local importance such as police, trade, commerce, agriculture and irrigation.
  • The State Governments alone can make laws relating to the subjects mentioned in the State List.

The correct answer is Dispersion.

Key Points

• When a beam of white light is made to fall on one refracting face of the prism, it splits into seven colours i.e. violet, indigo, blue, green, yellow, orange and red (VIBGYOR) from the base.
• The phenomenon of the splitting of white light into its constituent colours is called dispersion of light.
• The pattern of colour components of light is called the spectrum of light.
• The red light bends the least, while the violet light bends the most. 
• ​The rainbow is an example of the dispersion of sunlight by the water drops in the atmosphere. 

The logic followed is:

All the other options except option (3), the the number given are prime number whereas option 3 is a perfect cube. 

Option 1: 47

It is a prime number.

Option 2: 17

It is a prime number.

Option 3: 27

It is a perfect cube of 3.

Option 4: 37

It is a prime number..

Hence, the correct answer is "Option 3".

1) 8, 4, 3, 7, 1, 5, 2, 6

2) 5, 2, 7, 3, 4, 1, 8, 6

3) 3, 1, 6, 8, 4, 5, 2, 7

4) 1, 4, 8, 3, 2, 5, 7, 6

'POLITICS' is a meaningful English word.

Hence, '1, 4, 8, 3, 2, 5, 7, 6' is the correct answer.

The logic followed is:

Similarly,

Hence, the correct answer is "15".

The correct answer is 28th January 1950.

Key Points

• The Supreme Court in India was established under the Regulating Act, of 1773.
• The Regulating Act of 1773 established a Supreme Court at Fort William, Calcutta.
• Harilal Jekisundas Kania was the first Chief Justice of India.
• On the 28th of January, 1950, two days after India became the Sovereign Democratic Republic, the Supreme Court came into being.
• The inauguration took place in the Chamber of Princes in the Parliament building which also housed India's Parliament, consisting of the Council of States and the House of the People.
• In the Chamber of Princes, the Federal Court of India had sat for 12 years between 1937 and 1950.
• This was to be the home of the Supreme Court for years that were to follow until the Supreme Court acquired its own present premises.
• It replaced both the Federal Court of India and the Judicial Committee of the Privy Council.
• The First proceedings took place on 28 January 1950 at 9:45 am.​

The full form of ITCZ is The Intertropical Convergence Zone.

• It is the area encircling Earth near the Equator, where there is a convergence of the northeast and southeast trade winds takes place.
• The ITCZ was originally identified from the 1920s to the 1940s as the "Intertropical Front" but after the recognition in the 1940s and 1950s of the significance of wind field convergence in tropical weather production.

• Tripartite Pact, the agreement concluded by Germany, Italy, and Japan on September 27, 1940, one year after the start of World War II.
• It created a defense alliance between the countries and was largely intended to deter the United States from entering the conflict.
• Hungary, Romania, Slovakia, Bulgaria, Yugoslavia, and Croatia were later signatories to the pact.

• On October 25, 1936, Germany and Italy completed the Rome-Berlin Axis, a cooperation deal. A month later Japan joined the so-called Axis powers by signing (with Germany) the Anti-Comintern Pact, an anti-communist agreement that was primarily directed against the Soviet Union; Italy signed in 1937.

• However, that compact was broken with the German-Soviet Non-aggression Pact of August 23, 1939, which paved the way for Germany to invade Poland the following week, thus starting World War II.

• Against this backdrop, officials from Germany, Italy, and Japan met in Berlin in September 1940 to devise the Tripartite Pact.

• It notably called on signees “to assist one another with all political, economic and military means” when any one of them was attacked by “a Power at present not involved in the European War or in the Sino-Japanese Conflict.”

• Such wording notably excluded the Soviet Union, which was already involved in both wars, and was thus seen as a warning to the United States against entering World War II.

• The pact was signed by Joachim von Ribbentrop (Germany), Galeazzo Ciano (Italy), and Kurusu Saburo (Japan). Several other European countries—some of which had been coerced—were later signatories.

 XeF₂-sp³d hybridised Xe
Three lone pairs on equatorial positions to minimise repulsion; two F-atom at axial position. Thus, it is linear.

(a) TeF₂,Te₅₀ - Six electrons in valence shell

(b)   hybridised l- atom with three lone pairs at equatorial positions to minimise repulsion thus, linear.

(c) SoCI₃ - sp³-hybridised pyramidal Sb-one lone pair on Sb.
(d) BaCI₂ - ionic .

We know that white light is composed of many different colours. When white light is allowed to fall on [Ti(H₂O)₆]³⁺ ion, this ion absorbs the light of green and yellow colour and transmits is almost purple colour.The purple colour of the transmitted light is called complimentary colour of that of absorbed light.

∆H_r is called both enthalpy of combustion of hydrogen as well as enthalpy of formation of water.For the enthalpy of combustion of hydrogen, the reason is that 1 mole of Hydrogen is burnt in its pure state. For the formation of water, the reason is that 1 mole of water is formed from its constituent elements.

Volume decreased

i.e p increased

no.of moles reactant more

Electron donating —CH₃ gro up stabilises benzylic carbocation, hence increases reactivity of corresponding substrate. Electron withdrawing —NO₂ decreases stability of carbocation, decreases reactivity of corresponding substrate in S_N1 reaction

The correct answer is option A
2.03x 10^-4
The given equation is :-
 N2​(g)+3H2​(g) ⇌ 2NH_3​(g)
Initial moles : 1             3         0
At eqm ;       (1−x)    (3−3x)   (2x)               
(let)
Total moles of equation
 =1 − x + 3 − 3x + 2x = (4−2x)
Now, X(NH_3​) = 
⇒ 2x = 2 − x
⇒ 3x = 2 ⇒ x = 0.66 = 
32​
Now, at equation, moles of N₂​= 1/3, moles of NH_3​ = 4/3
             moles of H2 ​ =3 − 2 = 1

 

Molarity = 2.772 M =2.772 mol L^-1  Thus, NaOH =2.772 mol

The correct answer is Option A.

Total pressure =290 mm
Vapour pressure of propyl alcohol =200 mm
Mole fraction of ethyl alcohol = 0.6
Mol fraction of propyl alcohol =1− 0.6 = 0.4
 
PT = P⁰_A × χ_A + P⁰_B × (1−χ_A)
290 = 200 × 0.4 + P^o_B × 0.6
0.6 × P⁰B = 290 − 80
P⁰B = 350 mm

The correct answer is Option A.

Out of the given four compounds only the first one has a chiral carbon. Hence compound A is optically active and it can rotate the plane polarised light.
 

(i) Oxidation state of element in its free state is zero.

(ii) Sum of oxidation states of all atoms in compound is zero.

O.N of S in S₈=0;    O.N of S in S₂F₂=+1

O.N of S in H₂S=-2

This alkaline earth hydride is a colourless solid that is insoluble in solvents that do not decompose it. Unlike the ionically bonded hydrides of the heavier Group 2 elements, beryllium hydride is covalently bonded (three-center two-electron bond).

• Colloidal system is a mixture of two substances, one of which, called the dispersed phase (or colloid), is uniformly distributed in a finely divided state through the second substance, called the dispersion medium (or dispersing medium).
• So, here are 2 phases.

The electronic configuration of the Hydrogen atom is 1s1.

It has one electron in the outermost shell. It exists as a diatomic molecule (H2​) by sharing its' electron with other hydrogen atom.

It cannot form ionic compounds because it cannot donate its' electron and can only form covalent compounds by sharing the electron. It cannot lose an electron to form a cation because the hydrogen atom cannot exist after losing an electron.

Based on structure:


 bond has one electron; bond order y = 0.5.
 bond has two electrons; bond order x = 1.0.